387857172 has 12 divisors (see below), whose sum is σ = 905000096. Its totient is φ = 129285720.

The previous prime is 387857161. The next prime is 387857179. The reversal of 387857172 is 271758783.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387857179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16160704 + ... + 16160727.

Almost surely, 2^387857172 is an apocalyptic number.

It is an amenable number.

387857172 is an abundant number, since it is smaller than the sum of its proper divisors (517142924).

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

387857172 is a wasteful number, since it uses less digits than its factorization.

387857172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32321438 (or 32321436 counting only the distinct ones).

The product of its digits is 658560, while the sum is 48.

The square root of 387857172 is about 19694.0897733305. The cubic root of 387857172 is about 729.2737958574.

The spelling of 387857172 in words is "three hundred eighty-seven million, eight hundred fifty-seven thousand, one hundred seventy-two".