87144864 has 24 divisors (see below), whose sum is σ = 228755520. Its totient is φ = 29048256.

The previous prime is 87144857. The next prime is 87144881. The reversal of 87144864 is 46844178.

It is a happy number.

87144864 is nontrivially palindromic in base 11.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453784 + ... + 453975.

It is an arithmetic number, because the mean of its divisors is an integer number (9531480).

Almost surely, 2^87144864 is an apocalyptic number.

It is an amenable number.

87144864 is an abundant number, since it is smaller than the sum of its proper divisors (141610656).

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

87144864 is a wasteful number, since it uses less digits than its factorization.

87144864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907772 (or 907764 counting only the distinct ones).

The product of its digits is 172032, while the sum is 42.

The square root of 87144864 is about 9335.1413486888. The cubic root of 87144864 is about 443.3505642137.

The spelling of 87144864 in words is "eighty-seven million, one hundred forty-four thousand, eight hundred sixty-four".