388720402 has 32 divisors (see below), whose sum is σ = 707114880. Its totient is φ = 156453120.

The previous prime is 388720393. The next prime is 388720421. The reversal of 388720402 is 204027883.

It is a super-2 number, since 2×388720402² = 302207101862083208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127249 + ... + 130267.

It is an arithmetic number, because the mean of its divisors is an integer number (22097340).

Almost surely, 2^388720402 is an apocalyptic number.

388720402 is a deficient number, since it is larger than the sum of its proper divisors (318394478).

388720402 is a wasteful number, since it uses less digits than its factorization.

388720402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3586.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 388720402 is about 19715.9935585301. The cubic root of 388720402 is about 729.8144283416.

The spelling of 388720402 in words is "three hundred eighty-eight million, seven hundred twenty thousand, four hundred two".