978872438 has 24 divisors (see below), whose sum is σ = 1603126080. Its totient is φ = 447678000.

The previous prime is 978872413. The next prime is 978872441. The reversal of 978872438 is 834278879.

978872438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2438 + ... + 44313.

It is an arithmetic number, because the mean of its divisors is an integer number (66796920).

Almost surely, 2^978872438 is an apocalyptic number.

978872438 is a deficient number, since it is larger than the sum of its proper divisors (624253642).

978872438 is a wasteful number, since it uses less digits than its factorization.

978872438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46820 (or 46801 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 56.

The square root of 978872438 is about 31286.9371783177. The cubic root of 978872438 is about 992.9072917596.

The spelling of 978872438 in words is "nine hundred seventy-eight million, eight hundred seventy-two thousand, four hundred thirty-eight".