87511984 has 20 divisors (see below), whose sum is σ = 193776784. Its totient is φ = 37505088.

The previous prime is 87511981. The next prime is 87511997. The reversal of 87511984 is 48911578.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 87511984.

It is not an unprimeable number, because it can be changed into a prime (87511981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390567 + ... + 390790.

Almost surely, 2^87511984 is an apocalyptic number.

It is an amenable number.

87511984 is an abundant number, since it is smaller than the sum of its proper divisors (106264800).

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

87511984 is a wasteful number, since it uses less digits than its factorization.

87511984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781372 (or 781366 counting only the distinct ones).

The product of its digits is 80640, while the sum is 43.

The square root of 87511984 is about 9354.7840167478. The cubic root of 87511984 is about 443.9722678348.

The spelling of 87511984 in words is "eighty-seven million, five hundred eleven thousand, nine hundred eighty-four".