990900468 has 18 divisors (see below), whose sum is σ = 2504776274. Its totient is φ = 330300144.

The previous prime is 990900439. The next prime is 990900497. The reversal of 990900468 is 864009099.

It is an interprime number because it is at equal distance from previous prime (990900439) and next prime (990900497).

It can be written as a sum of positive squares in only one way, i.e., 976062564 + 14837904 = 31242^2 + 3852^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13762471 + ... + 13762542.

Almost surely, 2^990900468 is an apocalyptic number.

It is an amenable number.

990900468 is an abundant number, since it is smaller than the sum of its proper divisors (1513875806).

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

990900468 is a wasteful number, since it uses less digits than its factorization.

990900468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27525023 (or 27525018 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 990900468 is about 31478.5715686084. The cubic root of 990900468 is about 996.9575757083.

The spelling of 990900468 in words is "nine hundred ninety million, nine hundred thousand, four hundred sixty-eight".