120815870 has 72 divisors (see below), whose sum is σ = 267379704. Its totient is φ = 39184992.

The previous prime is 120815869. The next prime is 120815887. The reversal of 120815870 is 78518021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 176549 + ... + 177231.

It is an arithmetic number, because the mean of its divisors is an integer number (3713607).

Almost surely, 2^120815870 is an apocalyptic number.

120815870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120815870 is an abundant number, since it is smaller than the sum of its proper divisors (146563834).

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

120815870 is a wasteful number, since it uses less digits than its factorization.

120815870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 120815870 is about 10991.6272680618. The cubic root of 120815870 is about 494.3577290544.

The spelling of 120815870 in words is "one hundred twenty million, eight hundred fifteen thousand, eight hundred seventy".