387991608 has 32 divisors (see below), whose sum is σ = 977391360. Its totient is φ = 128342240.

The previous prime is 387991559. The next prime is 387991619. The reversal of 387991608 is 806199783.

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, 58560 + ... + 64847.

It is an arithmetic number, because the mean of its divisors is an integer number (30543480).

Almost surely, 2^387991608 is an apocalyptic number.

It is an amenable number.

387991608 is an abundant number, since it is smaller than the sum of its proper divisors (589399752).

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

387991608 is a wasteful number, since it uses less digits than its factorization.

387991608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123547 (or 123543 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 387991608 is about 19697.5025828149. The cubic root of 387991608 is about 729.3580445052.

The spelling of 387991608 in words is "three hundred eighty-seven million, nine hundred ninety-one thousand, six hundred eight".