390020556 has 24 divisors (see below), whose sum is σ = 917217280. Its totient is φ = 128982672.

The previous prime is 390020549. The next prime is 390020567. The reversal of 390020556 is 655020093.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126436 + ... + 129483.

Almost surely, 2^390020556 is an apocalyptic number.

It is an amenable number.

390020556 is an abundant number, since it is smaller than the sum of its proper divisors (527196724).

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

390020556 is a wasteful number, since it uses less digits than its factorization.

390020556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256053 (or 256051 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 390020556 is about 19748.9380980345. The cubic root of 390020556 is about 730.6271935130.

The spelling of 390020556 in words is "three hundred ninety million, twenty thousand, five hundred fifty-six".