990409732 has 48 divisors (see below), whose sum is σ = 2080391040. Its totient is φ = 407572992.

The previous prime is 990409727. The next prime is 990409733. The reversal of 990409732 is 237904099.

It is a super-2 number, since 2×990409732² = 1961822874480623648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (990409733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12688 + ... + 46279.

It is an arithmetic number, because the mean of its divisors is an integer number (43341480).

Almost surely, 2^990409732 is an apocalyptic number.

It is an amenable number.

990409732 is an abundant number, since it is smaller than the sum of its proper divisors (1089981308).

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

990409732 is a wasteful number, since it uses less digits than its factorization.

990409732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59020 (or 59018 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 990409732 is about 31470.7758404524. The cubic root of 990409732 is about 996.7929699531.

The spelling of 990409732 in words is "nine hundred ninety million, four hundred nine thousand, seven hundred thirty-two".