878258988 has 18 divisors (see below), whose sum is σ = 2220043644. Its totient is φ = 292752984.

The previous prime is 878258959. The next prime is 878258989. The reversal of 878258988 is 889852878.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (878258989) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12198006 + ... + 12198077.

It is an arithmetic number, because the mean of its divisors is an integer number (123335758).

Almost surely, 2^878258988 is an apocalyptic number.

It is an amenable number.

878258988 is an abundant number, since it is smaller than the sum of its proper divisors (1341784656).

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

878258988 is a wasteful number, since it uses less digits than its factorization.

878258988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24396093 (or 24396088 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 63.

The square root of 878258988 is about 29635.4346686530. The cubic root of 878258988 is about 957.6515905941.

The spelling of 878258988 in words is "eight hundred seventy-eight million, two hundred fifty-eight thousand, nine hundred eighty-eight".