989660456 has 16 divisors (see below), whose sum is σ = 1857587040. Its totient is φ = 494303920.

The previous prime is 989660449. The next prime is 989660473. The reversal of 989660456 is 654066989.

989660456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 989660398 and 989660407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57740 + ... + 72891.

It is an arithmetic number, because the mean of its divisors is an integer number (116099190).

Almost surely, 2^989660456 is an apocalyptic number.

It is an amenable number.

989660456 is a deficient number, since it is larger than the sum of its proper divisors (867926584).

989660456 is a wasteful number, since it uses less digits than its factorization.

989660456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131584 (or 131580 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 53.

The square root of 989660456 is about 31458.8692740219. The cubic root of 989660456 is about 996.5415381639.

The spelling of 989660456 in words is "nine hundred eighty-nine million, six hundred sixty thousand, four hundred fifty-six".