990872040 has 64 divisors (see below), whose sum is σ = 3129076800. Its totient is φ = 250324992.

The previous prime is 990872023. The next prime is 990872041. The reversal of 990872040 is 40278099.

990872040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 990872040.

It is not an unprimeable number, because it can be changed into a prime (990872041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215017 + ... + 219576.

It is an arithmetic number, because the mean of its divisors is an integer number (48891825).

Almost surely, 2^990872040 is an apocalyptic number.

It is an amenable number.

990872040 is an abundant number, since it is smaller than the sum of its proper divisors (2138204760).

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

990872040 is a wasteful number, since it uses less digits than its factorization.

990872040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434626 (or 434622 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 990872040 is about 31478.1200201029. The cubic root of 990872040 is about 996.9480416929.

The spelling of 990872040 in words is "nine hundred ninety million, eight hundred seventy-two thousand, forty".