870109992 has 32 divisors (see below), whose sum is σ = 2416972800. Its totient is φ = 290036592.

The previous prime is 870109979. The next prime is 870110009. The reversal of 870109992 is 299901078.

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, 2013928 + ... + 2014359.

It is an arithmetic number, because the mean of its divisors is an integer number (75530400).

Almost surely, 2^870109992 is an apocalyptic number.

It is an amenable number.

870109992 is an abundant number, since it is smaller than the sum of its proper divisors (1546862808).

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

870109992 is a wasteful number, since it uses less digits than its factorization.

870109992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028302 (or 4028292 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 870109992 is about 29497.6268875989. The cubic root of 870109992 is about 954.6805001957.

The spelling of 870109992 in words is "eight hundred seventy million, one hundred nine thousand, nine hundred ninety-two".