87081912 has 64 divisors (see below), whose sum is σ = 242784000. Its totient is φ = 28920672.

The previous prime is 87081901. The next prime is 87081913. The reversal of 87081912 is 21918078.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87081913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76983 + ... + 78105.

It is an arithmetic number, because the mean of its divisors is an integer number (3793500).

Almost surely, 2^87081912 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 87081912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121392000).

87081912 is an abundant number, since it is smaller than the sum of its proper divisors (155702088).

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

87081912 is a wasteful number, since it uses less digits than its factorization.

87081912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497 (or 1487 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 87081912 is about 9331.7689641354. The cubic root of 87081912 is about 443.2437821397.

The spelling of 87081912 in words is "eighty-seven million, eighty-one thousand, nine hundred twelve".