87912728 has 16 divisors (see below), whose sum is σ = 165620760. Its totient is φ = 43747200.

The previous prime is 87912709. The next prime is 87912731. The reversal of 87912728 is 82721978.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24353 + ... + 27728.

Almost surely, 2^87912728 is an apocalyptic number.

It is an amenable number.

87912728 is a deficient number, since it is larger than the sum of its proper divisors (77708032).

87912728 is a wasteful number, since it uses less digits than its factorization.

87912728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52298 (or 52294 counting only the distinct ones).

The product of its digits is 112896, while the sum is 44.

The square root of 87912728 is about 9376.1787525623. The cubic root of 87912728 is about 444.6489306990.

It can be divided in two parts, 87912 and 728, that multiplied together give a palindrome (63999936).

The spelling of 87912728 in words is "eighty-seven million, nine hundred twelve thousand, seven hundred twenty-eight".