87728775 has 24 divisors (see below), whose sum is σ = 145456464. Its totient is φ = 46656000.

The previous prime is 87728747. The next prime is 87728801. The reversal of 87728775 is 57782778.

It is not a de Polignac number, because 87728775 - 2¹⁰ = 87727751 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 28617 + ... + 31533.

It is an arithmetic number, because the mean of its divisors is an integer number (6060686).

Almost surely, 2^87728775 is an apocalyptic number.

87728775 is a deficient number, since it is larger than the sum of its proper divisors (57727689).

87728775 is a wasteful number, since it uses less digits than its factorization.

87728775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331 (or 3326 counting only the distinct ones).

The product of its digits is 1536640, while the sum is 51.

The square root of 87728775 is about 9366.3640223942. The cubic root of 87728775 is about 444.3385788939.

The spelling of 87728775 in words is "eighty-seven million, seven hundred twenty-eight thousand, seven hundred seventy-five".