388681316 has 24 divisors (see below), whose sum is σ = 707616000. Its totient is φ = 186581024.

The previous prime is 388681253. The next prime is 388681333. The reversal of 388681316 is 613186883.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11405 + ... + 30123.

It is an arithmetic number, because the mean of its divisors is an integer number (29484000).

Almost surely, 2^388681316 is an apocalyptic number.

It is an amenable number.

388681316 is a deficient number, since it is larger than the sum of its proper divisors (318934684).

388681316 is a wasteful number, since it uses less digits than its factorization.

388681316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18931 (or 18929 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 388681316 is about 19715.0023078873. The cubic root of 388681316 is about 729.7899664724.

The spelling of 388681316 in words is "three hundred eighty-eight million, six hundred eighty-one thousand, three hundred sixteen".