990347472 has 120 divisors (see below), whose sum is σ = 2903328064. Its totient is φ = 326778624.

The previous prime is 990347459. The next prime is 990347531. The reversal of 990347472 is 274743099.

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, 399228 + ... + 401700.

Almost surely, 2^990347472 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 990347472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451664032).

990347472 is an abundant number, since it is smaller than the sum of its proper divisors (1912980592).

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

990347472 is a wasteful number, since it uses less digits than its factorization.

990347472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599 (or 2581 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 990347472 is about 31469.7866532330. The cubic root of 990347472 is about 996.7720824258.

It can be divided in two parts, 9903 and 47472, that added together give a palindrome (57375).

The spelling of 990347472 in words is "nine hundred ninety million, three hundred forty-seven thousand, four hundred seventy-two".