87140256 has 192 divisors, whose sum is σ = 278691840. Its totient is φ = 23316480.

The previous prime is 87140233. The next prime is 87140297. The reversal of 87140256 is 65204178.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 979060 + ... + 979148.

It is an arithmetic number, because the mean of its divisors is an integer number (1451520).

Almost surely, 2^87140256 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 87140256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139345920).

87140256 is an abundant number, since it is smaller than the sum of its proper divisors (191551584).

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

87140256 is a wasteful number, since it uses less digits than its factorization.

87140256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 87140256 is about 9334.8945360941. The cubic root of 87140256 is about 443.3427496571.

The spelling of 87140256 in words is "eighty-seven million, one hundred forty thousand, two hundred fifty-six".