387697816 has 32 divisors (see below), whose sum is σ = 793774080. Its totient is φ = 176058400.

The previous prime is 387697799. The next prime is 387697829. The reversal of 387697816 is 618796783.

It is a congruent number.

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, 182601 + ... + 184711.

It is an arithmetic number, because the mean of its divisors is an integer number (24805440).

Almost surely, 2^387697816 is an apocalyptic number.

It is an amenable number.

387697816 is an abundant number, since it is smaller than the sum of its proper divisors (406076264).

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

387697816 is a wasteful number, since it uses less digits than its factorization.

387697816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4215 (or 4211 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 55.

The square root of 387697816 is about 19690.0435753708. The cubic root of 387697816 is about 729.1739050703.

The spelling of 387697816 in words is "three hundred eighty-seven million, six hundred ninety-seven thousand, eight hundred sixteen".