878011920 has 160 divisors (see below), whose sum is σ = 3202295040. Its totient is φ = 220354560.

The previous prime is 878011909. The next prime is 878011943. The reversal of 878011920 is 29110878.

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

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, 24765 + ... + 48675.

It is an arithmetic number, because the mean of its divisors is an integer number (20014344).

Almost surely, 2^878011920 is an apocalyptic number.

878011920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 878011920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1601147520).

878011920 is an abundant number, since it is smaller than the sum of its proper divisors (2324283120).

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

878011920 is a wasteful number, since it uses less digits than its factorization.

878011920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23950 (or 23938 counting only the distinct ones).

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

The square root of 878011920 is about 29631.2659196329. The cubic root of 878011920 is about 957.5617813781.

The spelling of 878011920 in words is "eight hundred seventy-eight million, eleven thousand, nine hundred twenty".