990454230 has 160 divisors (see below), whose sum is σ = 2829657600. Its totient is φ = 247883328.

The previous prime is 990454183. The next prime is 990454271. The reversal of 990454230 is 32454099.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2138979 + ... + 2139441.

It is an arithmetic number, because the mean of its divisors is an integer number (17685360).

Almost surely, 2^990454230 is an apocalyptic number.

990454230 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 990454230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1414828800).

990454230 is an abundant number, since it is smaller than the sum of its proper divisors (1839203370).

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

990454230 is a wasteful number, since it uses less digits than its factorization.

990454230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 990454230 is about 31471.4828058673. The cubic root of 990454230 is about 996.8078979934.

The spelling of 990454230 in words is "nine hundred ninety million, four hundred fifty-four thousand, two hundred thirty".