87815836 has 24 divisors (see below), whose sum is σ = 157051440. Its totient is φ = 42951552.

The previous prime is 87815831. The next prime is 87815873. The reversal of 87815836 is 63851878.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87815831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54190 + ... + 55786.

It is an arithmetic number, because the mean of its divisors is an integer number (6543810).

Almost surely, 2^87815836 is an apocalyptic number.

It is an amenable number.

87815836 is a deficient number, since it is larger than the sum of its proper divisors (69235604).

87815836 is a wasteful number, since it uses less digits than its factorization.

87815836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893 (or 1891 counting only the distinct ones).

The product of its digits is 322560, while the sum is 46.

The square root of 87815836 is about 9371.0104044335. The cubic root of 87815836 is about 444.4855157508.

The spelling of 87815836 in words is "eighty-seven million, eight hundred fifteen thousand, eight hundred thirty-six".