387131508 has 48 divisors (see below), whose sum is σ = 1004772160. Its totient is φ = 128902752.

The previous prime is 387131477. The next prime is 387131567. The reversal of 387131508 is 805131783.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155691 + ... + 158157.

Almost surely, 2^387131508 is an apocalyptic number.

It is an amenable number.

387131508 is an abundant number, since it is smaller than the sum of its proper divisors (617640652).

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

387131508 is a wasteful number, since it uses less digits than its factorization.

387131508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933 (or 3925 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 387131508 is about 19675.6577526648. The cubic root of 387131508 is about 728.8186986695.

The spelling of 387131508 in words is "three hundred eighty-seven million, one hundred thirty-one thousand, five hundred eight".