Properties of the Number 620

Six Hundred Twenty

Basics

Value: 619 → 620 → 621

Parity: even

Prime: No

Previous Prime: 619

Next Prime: 631

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 5 × 31

Divisors: 1, 2, 4, 5, 10, 20, 31, 62, 124, 155

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 1001101100

Octal: 1154

Duodecimal: 438

Hexadecimal: 26c

Square: 384400

Square Root: 24.899799195977465

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

Sums of four consecutive primes. A34963

Numbers that are the sum of 12 positive 5th powers. A3357

a(n) = σ(n)*φ(n). A62354

Numbers k such that the sum of the first k primes is prime. A13916

Multiples of 20 containing a 20 in their decimal representation. A121040

Numbers whose sum of digits is 8. A52222

Product of exactly four primes, three of which are distinct (p²*q·r). A85987

a(n) = ∑_{k=1..n, gcd(n,k) = 1} k². A53818

a(n) = n*(n+9)/2. A56000

Numbers k such that bsigma(k) = bsigma(k+1), where bsigma(k) is the sum of the bi-unitary divisors of k (A188999). A293183