387831912 has 64 divisors (see below), whose sum is σ = 1059804480. Its totient is φ = 117545472.

The previous prime is 387831907. The next prime is 387831923. The reversal of 387831912 is 219138783.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11628 + ... + 30180.

It is an arithmetic number, because the mean of its divisors is an integer number (16559445).

Almost surely, 2^387831912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387831912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529902240).

387831912 is an abundant number, since it is smaller than the sum of its proper divisors (671972568).

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

387831912 is a wasteful number, since it uses less digits than its factorization.

387831912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18642 (or 18638 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 387831912 is about 19693.4484537371. The cubic root of 387831912 is about 729.2579636926.

The spelling of 387831912 in words is "three hundred eighty-seven million, eight hundred thirty-one thousand, nine hundred twelve".