390056 has 8 divisors (see below), whose sum is σ = 731370. Its totient is φ = 195024.

The previous prime is 390043. The next prime is 390067. The reversal of 390056 is 650093.

It can be written as a sum of positive squares in only one way, i.e., 372100 + 17956 = 610^2 + 134^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

390056 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24371 + ... + 24386.

2³⁹⁰⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

390056 is a deficient number, since it is larger than the sum of its proper divisors (341314).

390056 is a wasteful number, since it uses less digits than its factorization.

390056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48763 (or 48759 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 390056 is about 624.5446341135. The cubic root of 390056 is about 73.0649325309.

The spelling of 390056 in words is "three hundred ninety thousand, fifty-six".