990315872 has 144 divisors (see below), whose sum is σ = 2572017840. Its totient is φ = 371008512.

The previous prime is 990315857. The next prime is 990315947. The reversal of 990315872 is 278513099.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 386018 + ... + 388574.

It is an arithmetic number, because the mean of its divisors is an integer number (17861235).

Almost surely, 2^990315872 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 990315872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1286008920).

990315872 is an abundant number, since it is smaller than the sum of its proper divisors (1581701968).

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

990315872 is a wasteful number, since it uses less digits than its factorization.

990315872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2613 (or 2598 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 990315872 is about 31469.2845803650. The cubic root of 990315872 is about 996.7614806476.

The spelling of 990315872 in words is "nine hundred ninety million, three hundred fifteen thousand, eight hundred seventy-two".