87112140 has 48 divisors (see below), whose sum is σ = 245306880. Its totient is φ = 23097280.

The previous prime is 87112121. The next prime is 87112187. The reversal of 87112140 is 4121178.

It is a self number, because there is not a number n which added to its sum of digits gives 87112140.

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 15 ways as a sum of consecutive naturals, for example, 6685 + ... + 14795.

It is an arithmetic number, because the mean of its divisors is an integer number (5110560).

Almost surely, 2^87112140 is an apocalyptic number.

It is an amenable number.

87112140 is an abundant number, since it is smaller than the sum of its proper divisors (158194740).

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

87112140 is a wasteful number, since it uses less digits than its factorization.

87112140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8302 (or 8300 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 87112140 is about 9333.3884522182. The cubic root of 87112140 is about 443.2950626822.

The spelling of 87112140 in words is "eighty-seven million, one hundred twelve thousand, one hundred forty".