87632690 has 16 divisors (see below), whose sum is σ = 158746392. Its totient is φ = 34829184.

The previous prime is 87632683. The next prime is 87632707. The reversal of 87632690 is 9623678.

It can be written as a sum of positive squares in 4 ways, for example, as 83302129 + 4330561 = 9127^2 + 2081^2 .

It is a super-2 number, since 2×87632690² = 15358976713272200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26339 + ... + 29478.

Almost surely, 2^87632690 is an apocalyptic number.

87632690 is a deficient number, since it is larger than the sum of its proper divisors (71113702).

87632690 is a wasteful number, since it uses less digits than its factorization.

87632690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55981.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 87632690 is about 9361.2333589116. The cubic root of 87632690 is about 444.1762989243.

The spelling of 87632690 in words is "eighty-seven million, six hundred thirty-two thousand, six hundred ninety".