388402864 has 40 divisors (see below), whose sum is σ = 793768640. Its totient is φ = 183601728.

The previous prime is 388402849. The next prime is 388402867. The reversal of 388402864 is 468204883.

It is a self number, because there is not a number n which added to its sum of digits gives 388402864.

It is not an unprimeable number, because it can be changed into a prime (388402867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194479 + ... + 196465.

It is an arithmetic number, because the mean of its divisors is an integer number (19844216).

Almost surely, 2^388402864 is an apocalyptic number.

It is an amenable number.

388402864 is an abundant number, since it is smaller than the sum of its proper divisors (405365776).

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

388402864 is a wasteful number, since it uses less digits than its factorization.

388402864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657 (or 2651 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 43.

The square root of 388402864 is about 19707.9391109268. The cubic root of 388402864 is about 729.6156505537.

The spelling of 388402864 in words is "three hundred eighty-eight million, four hundred two thousand, eight hundred sixty-four".