87186872 has 16 divisors (see below), whose sum is σ = 163622400. Its totient is φ = 43554240.

The previous prime is 87186871. The next prime is 87186889. The reversal of 87186872 is 27868178.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87186871) 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, 5972 + ... + 14492.

It is an arithmetic number, because the mean of its divisors is an integer number (10226400).

Almost surely, 2^87186872 is an apocalyptic number.

It is an amenable number.

87186872 is a deficient number, since it is larger than the sum of its proper divisors (76435528).

87186872 is a wasteful number, since it uses less digits than its factorization.

87186872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9806 (or 9802 counting only the distinct ones).

The product of its digits is 301056, while the sum is 47.

The square root of 87186872 is about 9337.3910703151. The cubic root of 87186872 is about 443.4217915083.

The spelling of 87186872 in words is "eighty-seven million, one hundred eighty-six thousand, eight hundred seventy-two".