87916788 has 18 divisors (see below), whose sum is σ = 222234194. Its totient is φ = 29305584.

The previous prime is 87916769. The next prime is 87916813. The reversal of 87916788 is 88761978.

It can be written as a sum of positive squares in only one way, i.e., 65901924 + 22014864 = 8118^2 + 4692^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×87916788² = 15458723224473888, 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 (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1221031 + ... + 1221102.

Almost surely, 2^87916788 is an apocalyptic number.

It is an amenable number.

87916788 is an abundant number, since it is smaller than the sum of its proper divisors (134317406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87916788 is a wasteful number, since it uses less digits than its factorization.

87916788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2442143 (or 2442138 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 87916788 is about 9376.3952561739. The cubic root of 87916788 is about 444.6557755435.

The spelling of 87916788 in words is "eighty-seven million, nine hundred sixteen thousand, seven hundred eighty-eight".