87131472 has 40 divisors (see below), whose sum is σ = 226369440. Its totient is φ = 28878720.

The previous prime is 87131449. The next prime is 87131479. The reversal of 87131472 is 27413178.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87131479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3522 + ... + 13662.

It is an arithmetic number, because the mean of its divisors is an integer number (5659236).

Almost surely, 2^87131472 is an apocalyptic number.

It is an amenable number.

87131472 is an abundant number, since it is smaller than the sum of its proper divisors (139237968).

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

87131472 is a wasteful number, since it uses less digits than its factorization.

87131472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10331 (or 10325 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 87131472 is about 9334.4240315083. The cubic root of 87131472 is about 443.3278523955.

The spelling of 87131472 in words is "eighty-seven million, one hundred thirty-one thousand, four hundred seventy-two".