87389824 has 16 divisors (see below), whose sum is σ = 174097170. Its totient is φ = 43694848.

The previous prime is 87389807. The next prime is 87389831. The reversal of 87389824 is 42898378.

It can be written as a sum of positive squares in only one way, i.e., 65934400 + 21455424 = 8120^2 + 4632^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341239 + ... + 341494.

Almost surely, 2^87389824 is an apocalyptic number.

It is an amenable number.

87389824 is a deficient number, since it is larger than the sum of its proper divisors (86707346).

87389824 is an equidigital number, since it uses as much as digits as its factorization.

87389824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682747 (or 682735 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The square root of 87389824 is about 9348.2524570103. The cubic root of 87389824 is about 443.7655879203.

The spelling of 87389824 in words is "eighty-seven million, three hundred eighty-nine thousand, eight hundred twenty-four".