990769856 has 14 divisors (see below), whose sum is σ = 1966059060. Its totient is φ = 495384896.

The previous prime is 990769853. The next prime is 990769963. The reversal of 990769856 is 658967099.

990769856 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 = 990769795 and 990769804.

It is not an unprimeable number, because it can be changed into a prime (990769853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7740326 + ... + 7740453.

It is an arithmetic number, because the mean of its divisors is an integer number (140432790).

Almost surely, 2^990769856 is an apocalyptic number.

It is an amenable number.

990769856 is a deficient number, since it is larger than the sum of its proper divisors (975289204).

990769856 is a wasteful number, since it uses less digits than its factorization.

990769856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15480791 (or 15480781 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 59.

The square root of 990769856 is about 31476.4968825948. The cubic root of 990769856 is about 996.9137703183.

The spelling of 990769856 in words is "nine hundred ninety million, seven hundred sixty-nine thousand, eight hundred fifty-six".