978990729836 has 24 divisors (see below), whose sum is σ = 1958026215936. Its totient is φ = 419557865040.

The previous prime is 978990729767. The next prime is 978990729919. The reversal of 978990729836 is 638927099879.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 924131 + ... + 1676901.

It is an arithmetic number, because the mean of its divisors is an integer number (81584425664).

Almost surely, 2^978990729836 is an apocalyptic number.

It is an amenable number.

978990729836 is an abundant number, since it is smaller than the sum of its proper divisors (979035486100).

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

978990729836 is a wasteful number, since it uses less digits than its factorization.

978990729836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799229 (or 799227 counting only the distinct ones).

The product of its (nonzero) digits is 740710656, while the sum is 77.

The spelling of 978990729836 in words is "nine hundred seventy-eight billion, nine hundred ninety million, seven hundred twenty-nine thousand, eight hundred thirty-six".