978839128 has 16 divisors (see below), whose sum is σ = 1844024760. Its totient is φ = 487099200.

The previous prime is 978839089. The next prime is 978839137. The reversal of 978839128 is 821938879.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288253 + ... + 291628.

Almost surely, 2^978839128 is an apocalyptic number.

It is an amenable number.

978839128 is a deficient number, since it is larger than the sum of its proper divisors (865185632).

978839128 is a wasteful number, since it uses less digits than its factorization.

978839128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580098 (or 580094 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 55.

The square root of 978839128 is about 31286.4048429985. The cubic root of 978839128 is about 992.8960291014.

The spelling of 978839128 in words is "nine hundred seventy-eight million, eight hundred thirty-nine thousand, one hundred twenty-eight".