388890366 has 32 divisors (see below), whose sum is σ = 837767040. Its totient is φ = 119949984.

The previous prime is 388890343. The next prime is 388890379. The reversal of 388890366 is 663098883.

It is a super-2 number, since 2×388890366² = 302471433535227912, which contains 22 as substring.

It is a congruent number.

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, 34765 + ... + 44568.

It is an arithmetic number, because the mean of its divisors is an integer number (26180220).

Almost surely, 2^388890366 is an apocalyptic number.

388890366 is an abundant number, since it is smaller than the sum of its proper divisors (448876674).

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

388890366 is a wasteful number, since it uses less digits than its factorization.

388890366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79400.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 388890366 is about 19720.3033952320. The cubic root of 388890366 is about 729.9207807949.

The spelling of 388890366 in words is "three hundred eighty-eight million, eight hundred ninety thousand, three hundred sixty-six".