990100220 has 24 divisors (see below), whose sum is σ = 2083500384. Its totient is φ = 395222976.

The previous prime is 990100217. The next prime is 990100231. The reversal of 990100220 is 22001099.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41087 + ... + 60566.

It is an arithmetic number, because the mean of its divisors is an integer number (86812516).

Almost surely, 2^990100220 is an apocalyptic number.

It is an amenable number.

990100220 is an abundant number, since it is smaller than the sum of its proper divisors (1093400164).

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

990100220 is a wasteful number, since it uses less digits than its factorization.

990100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102149 (or 102147 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 990100220 is about 31465.8580051458. The cubic root of 990100220 is about 996.6891235282.

The spelling of 990100220 in words is "nine hundred ninety million, one hundred thousand, two hundred twenty".