990236481000 has 512 divisors, whose sum is σ = 3382970572800. Its totient is φ = 239690880000.

The previous prime is 990236480983. The next prime is 990236481029. The reversal of 990236481000 is 184632099.

It is a super-2 number, since 2×990236481000² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1019810515 + ... + 1019811485.

It is an arithmetic number, because the mean of its divisors is an integer number (6607364400).

Almost surely, 2^990236481000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990236481000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1691485286400).

990236481000 is an abundant number, since it is smaller than the sum of its proper divisors (2392734091800).

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

990236481000 is a wasteful number, since it uses less digits than its factorization.

990236481000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418 (or 1404 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 990236481000 in words is "nine hundred ninety billion, two hundred thirty-six million, four hundred eighty-one thousand".