87639272 has 32 divisors (see below), whose sum is σ = 188713920. Its totient is φ = 37376640.

The previous prime is 87639259. The next prime is 87639281. The reversal of 87639272 is 27293678.

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, 8108 + ... + 15524.

It is an arithmetic number, because the mean of its divisors is an integer number (5897310).

Almost surely, 2^87639272 is an apocalyptic number.

It is an amenable number.

87639272 is an abundant number, since it is smaller than the sum of its proper divisors (101074648).

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

87639272 is a wasteful number, since it uses less digits than its factorization.

87639272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7641 (or 7637 counting only the distinct ones).

The product of its digits is 254016, while the sum is 44.

The square root of 87639272 is about 9361.5849085505. The cubic root of 87639272 is about 444.1874191855.

The spelling of 87639272 in words is "eighty-seven million, six hundred thirty-nine thousand, two hundred seventy-two".