990791768 has 16 divisors (see below), whose sum is σ = 1888190160. Its totient is φ = 487274400.

The previous prime is 990791761. The next prime is 990791771. The reversal of 990791768 is 867197099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990791761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1014668 + ... + 1015643.

It is an arithmetic number, because the mean of its divisors is an integer number (118011885).

Almost surely, 2^990791768 is an apocalyptic number.

It is an amenable number.

990791768 is a deficient number, since it is larger than the sum of its proper divisors (897398392).

990791768 is a wasteful number, since it uses less digits than its factorization.

990791768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030378 (or 2030374 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 56.

The square root of 990791768 is about 31476.8449498993. The cubic root of 990791768 is about 996.9211195573.

The spelling of 990791768 in words is "nine hundred ninety million, seven hundred ninety-one thousand, seven hundred sixty-eight".