388402816 has 32 divisors (see below), whose sum is σ = 783115200. Its totient is φ = 191856384.

The previous prime is 388402793. The next prime is 388402849. The reversal of 388402816 is 618204883.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7656 + ... + 28903.

It is an arithmetic number, because the mean of its divisors is an integer number (24472350).

Almost surely, 2^388402816 is an apocalyptic number.

It is an amenable number.

388402816 is an abundant number, since it is smaller than the sum of its proper divisors (394712384).

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

388402816 is an equidigital number, since it uses as much as digits as its factorization.

388402816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36656 (or 36644 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 388402816 is about 19707.9378931435. The cubic root of 388402816 is about 729.6156204976.

The spelling of 388402816 in words is "three hundred eighty-eight million, four hundred two thousand, eight hundred sixteen".