87164724 has 12 divisors (see below), whose sum is σ = 203384384. Its totient is φ = 29054904.

The previous prime is 87164699. The next prime is 87164747. The reversal of 87164724 is 42746178.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3631852 + ... + 3631875.

Almost surely, 2^87164724 is an apocalyptic number.

It is an amenable number.

87164724 is an abundant number, since it is smaller than the sum of its proper divisors (116219660).

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

87164724 is a wasteful number, since it uses less digits than its factorization.

87164724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7263734 (or 7263732 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 87164724 is about 9336.2050106025. The cubic root of 87164724 is about 443.3842409867.

The spelling of 87164724 in words is "eighty-seven million, one hundred sixty-four thousand, seven hundred twenty-four".