87617992 has 32 divisors (see below), whose sum is σ = 204822720. Its totient is φ = 34136640.

The previous prime is 87617989. The next prime is 87618023. The reversal of 87617992 is 29971678.

It is a happy number.

It is a super-2 number, since 2×87617992² = 15353825044224128, 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, 70503 + ... + 71734.

It is an arithmetic number, because the mean of its divisors is an integer number (6400710).

Almost surely, 2^87617992 is an apocalyptic number.

It is an amenable number.

87617992 is an abundant number, since it is smaller than the sum of its proper divisors (117204728).

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

87617992 is a wasteful number, since it uses less digits than its factorization.

87617992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142261 (or 142257 counting only the distinct ones).

The product of its digits is 381024, while the sum is 49.

The square root of 87617992 is about 9360.4482798635. The cubic root of 87617992 is about 444.1514647052.

The spelling of 87617992 in words is "eighty-seven million, six hundred seventeen thousand, nine hundred ninety-two".