87911912 has 32 divisors (see below), whose sum is σ = 180856800. Its totient is φ = 39729600.

The previous prime is 87911903. The next prime is 87911921. The reversal of 87911912 is 21911978.

It is an interprime number because it is at equal distance from previous prime (87911903) and next prime (87911921).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12962 + ... + 18542.

It is an arithmetic number, because the mean of its divisors is an integer number (5651775).

Almost surely, 2^87911912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87911912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90428400).

87911912 is an abundant number, since it is smaller than the sum of its proper divisors (92944888).

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

87911912 is a wasteful number, since it uses less digits than its factorization.

87911912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5777 (or 5773 counting only the distinct ones).

The product of its digits is 9072, while the sum is 38.

The square root of 87911912 is about 9376.1352379325. The cubic root of 87911912 is about 444.6475549609.

The spelling of 87911912 in words is "eighty-seven million, nine hundred eleven thousand, nine hundred twelve".