878639616 has 80 divisors (see below), whose sum is σ = 2600875200. Its totient is φ = 292875264.

The previous prime is 878639599. The next prime is 878639639. The reversal of 878639616 is 616936878.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 17956 + ... + 45603.

It is an arithmetic number, because the mean of its divisors is an integer number (32510940).

Almost surely, 2^878639616 is an apocalyptic number.

It is an amenable number.

878639616 is an abundant number, since it is smaller than the sum of its proper divisors (1722235584).

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

878639616 is an equidigital number, since it uses as much as digits as its factorization.

878639616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63586 (or 63564 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 878639616 is about 29641.8558123475. The cubic root of 878639616 is about 957.7899159132.

It can be divided in two parts, 87863 and 9616, that added together give a palindrome (97479).

The spelling of 878639616 in words is "eight hundred seventy-eight million, six hundred thirty-nine thousand, six hundred sixteen".