990209922 has 16 divisors (see below), whose sum is σ = 2132760000. Its totient is φ = 304679952.

The previous prime is 990209867. The next prime is 990209923. The reversal of 990209922 is 229902099.

It is not an unprimeable number, because it can be changed into a prime (990209923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6347422 + ... + 6347577.

It is an arithmetic number, because the mean of its divisors is an integer number (133297500).

Almost surely, 2^990209922 is an apocalyptic number.

990209922 is an abundant number, since it is smaller than the sum of its proper divisors (1142550078).

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

990209922 is a wasteful number, since it uses less digits than its factorization.

990209922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12695017.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 990209922 is about 31467.6011478473. The cubic root of 990209922 is about 996.7259328498.

The spelling of 990209922 in words is "nine hundred ninety million, two hundred nine thousand, nine hundred twenty-two".