990317874 has 64 divisors (see below), whose sum is σ = 2445198336. Its totient is φ = 260380224.

The previous prime is 990317819. The next prime is 990317893. The reversal of 990317874 is 478713099.

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, 186849 + ... + 192075.

It is an arithmetic number, because the mean of its divisors is an integer number (38206224).

Almost surely, 2^990317874 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990317874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1222599168).

990317874 is an abundant number, since it is smaller than the sum of its proper divisors (1454880462).

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

990317874 is a wasteful number, since it uses less digits than its factorization.

990317874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5599.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 990317874 is about 31469.3163891433. The cubic root of 990317874 is about 996.7621523239.

The spelling of 990317874 in words is "nine hundred ninety million, three hundred seventeen thousand, eight hundred seventy-four".