878922644 has 48 divisors (see below), whose sum is σ = 1703939328. Its totient is φ = 394572288.

The previous prime is 878922641. The next prime is 878922673. The reversal of 878922644 is 446229878.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 878922592 and 878922601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878922641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1136642 + ... + 1137414.

It is an arithmetic number, because the mean of its divisors is an integer number (35498736).

Almost surely, 2^878922644 is an apocalyptic number.

It is an amenable number.

878922644 is a deficient number, since it is larger than the sum of its proper divisors (825016684).

878922644 is a wasteful number, since it uses less digits than its factorization.

878922644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544 (or 1542 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 50.

The square root of 878922644 is about 29646.6295554824. The cubic root of 878922644 is about 957.8927461891.

The spelling of 878922644 in words is "eight hundred seventy-eight million, nine hundred twenty-two thousand, six hundred forty-four".