87186472 has 16 divisors (see below), whose sum is σ = 173091060. Its totient is φ = 41028864.

The previous prime is 87186461. The next prime is 87186493. The reversal of 87186472 is 27468178.

It can be written as a sum of positive squares in 2 ways, for example, as 86007076 + 1179396 = 9274^2 + 1086^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320403 + ... + 320674.

Almost surely, 2^87186472 is an apocalyptic number.

It is an amenable number.

87186472 is a deficient number, since it is larger than the sum of its proper divisors (85904588).

87186472 is a wasteful number, since it uses less digits than its factorization.

87186472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641100 (or 641096 counting only the distinct ones).

The product of its digits is 150528, while the sum is 43.

The square root of 87186472 is about 9337.3696510313. The cubic root of 87186472 is about 443.4211133902.

The spelling of 87186472 in words is "eighty-seven million, one hundred eighty-six thousand, four hundred seventy-two".