388320916 has 6 divisors (see below), whose sum is σ = 679561610. Its totient is φ = 194160456.

The previous prime is 388320871. The next prime is 388320941. The reversal of 388320916 is 619023883.

It can be written as a sum of positive squares in only one way, i.e., 318765316 + 69555600 = 17854^2 + 8340^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48540111 + ... + 48540118.

Almost surely, 2^388320916 is an apocalyptic number.

It is an amenable number.

388320916 is a deficient number, since it is larger than the sum of its proper divisors (291240694).

388320916 is a wasteful number, since it uses less digits than its factorization.

388320916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97080233 (or 97080231 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 388320916 is about 19705.8599406369. The cubic root of 388320916 is about 729.5643337772.

The spelling of 388320916 in words is "three hundred eighty-eight million, three hundred twenty thousand, nine hundred sixteen".