87816956 has 12 divisors (see below), whose sum is σ = 155785392. Its totient is φ = 43306848.

The previous prime is 87816941. The next prime is 87816973. The reversal of 87816956 is 65961878.

It is a happy number.

It is a super-2 number, since 2×87816956² = 15423635522211872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150080 + ... + 150663.

It is an arithmetic number, because the mean of its divisors is an integer number (12982116).

Almost surely, 2^87816956 is an apocalyptic number.

It is an amenable number.

87816956 is a deficient number, since it is larger than the sum of its proper divisors (67968436).

87816956 is a wasteful number, since it uses less digits than its factorization.

87816956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300820 (or 300818 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 87816956 is about 9371.0701630070. The cubic root of 87816956 is about 444.4874053935.

The spelling of 87816956 in words is "eighty-seven million, eight hundred sixteen thousand, nine hundred fifty-six".