878808080 has 20 divisors (see below), whose sum is σ = 2043228972. Its totient is φ = 351523200.

The previous prime is 878808061. The next prime is 878808089. The reversal of 878808080 is 80808878.

It can be written as a sum of positive squares in 2 ways, for example, as 405136384 + 473671696 = 20128^2 + 21764^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (878808089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5492471 + ... + 5492630.

Almost surely, 2^878808080 is an apocalyptic number.

878808080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

878808080 is an abundant number, since it is smaller than the sum of its proper divisors (1164420892).

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

878808080 is a wasteful number, since it uses less digits than its factorization.

878808080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10985114 (or 10985108 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 47.

The square root of 878808080 is about 29644.6973335873. The cubic root of 878808080 is about 957.8511252366.

The spelling of 878808080 in words is "eight hundred seventy-eight million, eight hundred eight thousand, eighty".