Properties of the Number -390389

Three Hundred Ninety Thousand Three Hundred Eighty-Nine

Basics

Value: -390390 → -390389 → -390388

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 390389

Divisors: 1, 390389

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1011111010011110101

Octal: -1372365

Duodecimal: -169B05

Hexadecimal: -5f4f5

Square: 152403571321

Square Root: 624.8111714750305

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

Smaller of twin primes of the form P=j·P(i)#-1 and P=j·P(i)#+1 with 0 < j < P(i+1), where P(i) denotes i-th prime and P(i)# the i-th primorial number A002110(i). A87732

Smaller of twin primes whose middle term is a multiple of A002110(5)=2310. A60231

Smaller of twin primes whose mean (average) is a multiple of A002110(6)=30030. A60232

Numbers k where records occur for φ(k)/φ(k+1), where φ is the Euler totient function (A000010). A335070

Numbers k such that φ(σ(k))/k < φ(σ(m))/m for all m < k, where σ is the sum of divisors function (A000203) and φ is Euler's totient function (A000010). A293711

Numbers k such that φ(ψ(k))/k < φ(ψ(m))/m for all m < k, where φ is Euler's totient function (A000010) and ψ is the Dedekind ψ function (A001615). A293713