87631146 has 24 divisors (see below), whose sum is σ = 196900704. Its totient is φ = 29210220.

The previous prime is 87631129. The next prime is 87631147. The reversal of 87631146 is 64113678.

87631146 is a `hidden beast` number, since 8 + 7 + 631 + 14 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 87631146.

It is not an unprimeable number, because it can be changed into a prime (87631147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89670 + ... + 90641.

It is an arithmetic number, because the mean of its divisors is an integer number (8204196).

Almost surely, 2^87631146 is an apocalyptic number.

87631146 is an abundant number, since it is smaller than the sum of its proper divisors (109269558).

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

87631146 is a wasteful number, since it uses less digits than its factorization.

87631146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180328 (or 180316 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 87631146 is about 9361.1508907826. The cubic root of 87631146 is about 444.1736902622.

The spelling of 87631146 in words is "eighty-seven million, six hundred thirty-one thousand, one hundred forty-six".