87728265 has 40 divisors (see below), whose sum is σ = 158070528. Its totient is φ = 46548000.

The previous prime is 87728243. The next prime is 87728281. The reversal of 87728265 is 56282778.

It is not a de Polignac number, because 87728265 - 2¹⁸ = 87466121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87728265.

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 39 ways as a sum of consecutive naturals, for example, 101224 + ... + 102086.

Almost surely, 2^87728265 is an apocalyptic number.

It is an amenable number.

87728265 is a deficient number, since it is larger than the sum of its proper divisors (70342263).

87728265 is a wasteful number, since it uses less digits than its factorization.

87728265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131 (or 1122 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 87728265 is about 9366.3367972757. The cubic root of 87728265 is about 444.3377178571.

The spelling of 87728265 in words is "eighty-seven million, seven hundred twenty-eight thousand, two hundred sixty-five".