990022005 has 48 divisors (see below), whose sum is σ = 2046470400. Its totient is φ = 432900864.

The previous prime is 990022003. The next prime is 990022021. The reversal of 990022005 is 500220099.

It is not a de Polignac number, because 990022005 - 2¹ = 990022003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 990022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990022001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61080 + ... + 75569.

It is an arithmetic number, because the mean of its divisors is an integer number (42634800).

Almost surely, 2^990022005 is an apocalyptic number.

It is an amenable number.

990022005 is an abundant number, since it is smaller than the sum of its proper divisors (1056448395).

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

990022005 is a wasteful number, since it uses less digits than its factorization.

990022005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136690 (or 136687 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 990022005 is about 31464.6151255661. The cubic root of 990022005 is about 996.6628776690.

The spelling of 990022005 in words is "nine hundred ninety million, twenty-two thousand, five".