87855916 has 24 divisors (see below), whose sum is σ = 155463840. Its totient is φ = 43441152.

The previous prime is 87855869. The next prime is 87855917. The reversal of 87855916 is 61955878.

It is a self number, because there is not a number n which added to its sum of digits gives 87855916.

It is not an unprimeable number, because it can be changed into a prime (87855917) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 244545 + ... + 244903.

It is an arithmetic number, because the mean of its divisors is an integer number (6477660).

Almost surely, 2^87855916 is an apocalyptic number.

It is an amenable number.

87855916 is a deficient number, since it is larger than the sum of its proper divisors (67607924).

87855916 is a wasteful number, since it uses less digits than its factorization.

87855916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873 (or 871 counting only the distinct ones).

The product of its digits is 604800, while the sum is 49.

The square root of 87855916 is about 9373.1486705376. The cubic root of 87855916 is about 444.5531279669.

The spelling of 87855916 in words is "eighty-seven million, eight hundred fifty-five thousand, nine hundred sixteen".