990793172 has 12 divisors (see below), whose sum is σ = 1809274656. Its totient is φ = 473857560.

The previous prime is 990793169. The next prime is 990793187. The reversal of 990793172 is 271397099.

It is a super-2 number, since 2×990793172² = 1963342219363643168, which contains 22 as substring.

It is a congruent number.

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, 5384654 + ... + 5384837.

It is an arithmetic number, because the mean of its divisors is an integer number (150772888).

Almost surely, 2^990793172 is an apocalyptic number.

990793172 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

990793172 is a deficient number, since it is larger than the sum of its proper divisors (818481484).

990793172 is a wasteful number, since it uses less digits than its factorization.

990793172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10769518 (or 10769516 counting only the distinct ones).

The product of its (nonzero) digits is 214326, while the sum is 47.

The square root of 990793172 is about 31476.8672519995. The cubic root of 990793172 is about 996.9215904523.

The spelling of 990793172 in words is "nine hundred ninety million, seven hundred ninety-three thousand, one hundred seventy-two".