388021256 has 16 divisors (see below), whose sum is σ = 831474240. Its totient is φ = 166294800.

The previous prime is 388021223. The next prime is 388021273. The reversal of 388021256 is 652120883.

It is an unprimeable 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 in 3 ways as a sum of consecutive naturals, for example, 3464420 + ... + 3464531.

It is an arithmetic number, because the mean of its divisors is an integer number (51967140).

Almost surely, 2^388021256 is an apocalyptic number.

It is an amenable number.

388021256 is an abundant number, since it is smaller than the sum of its proper divisors (443452984).

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

388021256 is a wasteful number, since it uses less digits than its factorization.

388021256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6928964 (or 6928960 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 388021256 is about 19698.2551511549. The cubic root of 388021256 is about 729.3766217597.

The spelling of 388021256 in words is "three hundred eighty-eight million, twenty-one thousand, two hundred fifty-six".