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Properties of the Number 390

Three Hundred Ninety

Basics

Value: 389 → 390 → 391

Parity: even

Prime: No

Previous Prime: 389

Next Prime: 397

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 5 × 13

Divisors: 1, 2, 3, 5, 6, 10, 13, 15, 26, 30

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 110000110

Octal: 606

Duodecimal: 286

Hexadecimal: 186

Square: 152100

Square Root: 19.748417658131498

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Expansion of ∏m >= 1 (1 + xm); number of partitions of n into distinct parts; number of partitions of n into odd parts. A9
The squarefree numbers ordered lexicographically by their prime factorization (with factors written in decreasing order). a(n) = ∏k in I prime(k+1), where I is the set of indices of nonzero binary digits in n = ∑k in I 2k. A19565
Numbers that are the sum of 2 successive primes. A1043
Binary partition function: number of partitions of n into powers of 2. A18819
Number of binary partitions: number of partitions of 2n into powers of 2. A123
Multiples of 10: a(n) = 10·n. A8592
Products of exactly four distinct primes. A46386
A number n is included if it satisfies: m divides n for all m's where the m-th prime divides n. A120383
Infinite sequence starting with a(0)=0 such that A049820(a(k)) = a(k-1) for all k>=1, where A049820(n) = n - (number of divisors of n). A259934
a(n) = n*(4·n-1). A33991

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