87321976 has 32 divisors (see below), whose sum is σ = 189383040. Its totient is φ = 36970848.

The previous prime is 87321937. The next prime is 87321991. The reversal of 87321976 is 67912378.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4746 + ... + 14041.

It is an arithmetic number, because the mean of its divisors is an integer number (5918220).

Almost surely, 2^87321976 is an apocalyptic number.

It is an amenable number.

87321976 is an abundant number, since it is smaller than the sum of its proper divisors (102061064).

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

87321976 is a wasteful number, since it uses less digits than its factorization.

87321976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18883 (or 18879 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 87321976 is about 9344.6228388309. The cubic root of 87321976 is about 443.6507141225.

The spelling of 87321976 in words is "eighty-seven million, three hundred twenty-one thousand, nine hundred seventy-six".