390658656 has 48 divisors (see below), whose sum is σ = 1026514944. Its totient is φ = 130088064.

The previous prime is 390658643. The next prime is 390658669. The reversal of 390658656 is 656856093.

It is an interprime number because it is at equal distance from previous prime (390658643) and next prime (390658669).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×390658656² = 305228371015452672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158425 + ... + 160871.

It is an arithmetic number, because the mean of its divisors is an integer number (21385728).

Almost surely, 2^390658656 is an apocalyptic number.

It is an amenable number.

390658656 is an abundant number, since it is smaller than the sum of its proper divisors (635856288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

390658656 is a wasteful number, since it uses less digits than its factorization.

390658656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4123 (or 4115 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The square root of 390658656 is about 19765.0867946488. The cubic root of 390658656 is about 731.0254282417.

The spelling of 390658656 in words is "three hundred ninety million, six hundred fifty-eight thousand, six hundred fifty-six".