990788572 has 48 divisors (see below), whose sum is σ = 1852103232. Its totient is φ = 462725120.

The previous prime is 990788569. The next prime is 990788587. The reversal of 990788572 is 275887099.

Together with 861314660 it forms an amicable pair .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1545372 + ... + 1546012.

It is an arithmetic number, because the mean of its divisors is an integer number (38585484).

Almost surely, 2^990788572 is an apocalyptic number.

990788572 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

990788572 is a deficient number, since it is larger than the sum of its proper divisors (861314660).

990788572 is a wasteful number, since it uses less digits than its factorization.

990788572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 55.

The square root of 990788572 is about 31476.7941823814. The cubic root of 990788572 is about 996.9200476323.

The spelling of 990788572 in words is "nine hundred ninety million, seven hundred eighty-eight thousand, five hundred seventy-two".