87705408 has 56 divisors (see below), whose sum is σ = 265208512. Its totient is φ = 25058304.

The previous prime is 87705403. The next prime is 87705419. The reversal of 87705408 is 80450778.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87705403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31285 + ... + 33972.

Almost surely, 2^87705408 is an apocalyptic number.

It is an amenable number.

87705408 is an abundant number, since it is smaller than the sum of its proper divisors (177503104).

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

87705408 is a wasteful number, since it uses less digits than its factorization.

87705408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65279 (or 65269 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 87705408 is about 9365.1165502625. The cubic root of 87705408 is about 444.2991247864.

The spelling of 87705408 in words is "eighty-seven million, seven hundred five thousand, four hundred eight".