990881256 has 16 divisors (see below), whose sum is σ = 2477203200. Its totient is φ = 330293744.

The previous prime is 990881219. The next prime is 990881257. The reversal of 990881256 is 652188099.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (990881257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20643336 + ... + 20643383.

It is an arithmetic number, because the mean of its divisors is an integer number (154825200).

Almost surely, 2^990881256 is an apocalyptic number.

It is an amenable number.

990881256 is an abundant number, since it is smaller than the sum of its proper divisors (1486321944).

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

990881256 is a wasteful number, since it uses less digits than its factorization.

990881256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41286728 (or 41286724 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 990881256 is about 31478.2664071578. The cubic root of 990881256 is about 996.9511325208.

The spelling of 990881256 in words is "nine hundred ninety million, eight hundred eighty-one thousand, two hundred fifty-six".