87856756 has 12 divisors (see below), whose sum is σ = 165576292. Its totient is φ = 40549248.

The previous prime is 87856733. The next prime is 87856763. The reversal of 87856756 is 65765878.

It can be written as a sum of positive squares in 2 ways, for example, as 5664400 + 82192356 = 2380^2 + 9066^2 .

It is a Harshad number since it is a multiple of its sum of digits (52), and also a Moran number because the ratio is a prime number: 1689553 = 87856756 / (8 + 7 + 8 + 5 + 6 + 7 + 5 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844725 + ... + 844828.

Almost surely, 2^87856756 is an apocalyptic number.

It is an amenable number.

87856756 is a deficient number, since it is larger than the sum of its proper divisors (77719536).

87856756 is a wasteful number, since it uses less digits than its factorization.

87856756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689570 (or 1689568 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 52.

The square root of 87856756 is about 9373.1934792791. The cubic root of 87856756 is about 444.5545447694.

The spelling of 87856756 in words is "eighty-seven million, eight hundred fifty-six thousand, seven hundred fifty-six".