87172386 has 32 divisors (see below), whose sum is σ = 203015808. Its totient is φ = 24435840.

The previous prime is 87172373. The next prime is 87172387. The reversal of 87172386 is 68327178.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (87172387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17355 + ... + 21806.

It is an arithmetic number, because the mean of its divisors is an integer number (6344244).

Almost surely, 2^87172386 is an apocalyptic number.

87172386 is an abundant number, since it is smaller than the sum of its proper divisors (115843422).

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

87172386 is a wasteful number, since it uses less digits than its factorization.

87172386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39226.

The product of its digits is 112896, while the sum is 42.

The square root of 87172386 is about 9336.6153396185. The cubic root of 87172386 is about 443.3972321386.

The spelling of 87172386 in words is "eighty-seven million, one hundred seventy-two thousand, three hundred eighty-six".