990001110 has 64 divisors (see below), whose sum is σ = 2722636800. Its totient is φ = 225685632.

The previous prime is 990001097. The next prime is 990001127. The reversal of 990001110 is 11100099.

It is a Harshad number since it is a multiple of its sum of digits (21).

990001110 is a modest number, since divided by 1110 gives 990 as remainder.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75631 + ... + 87749.

It is an arithmetic number, because the mean of its divisors is an integer number (42541200).

Almost surely, 2^990001110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990001110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1361318400).

990001110 is an abundant number, since it is smaller than the sum of its proper divisors (1732635690).

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

990001110 is a wasteful number, since it uses less digits than its factorization.

990001110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12525.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 990001110 is about 31464.2830841575. The cubic root of 990001110 is about 996.6558658999.

The spelling of 990001110 in words is "nine hundred ninety million, one thousand, one hundred ten".