990748686 has 16 divisors (see below), whose sum is σ = 1982058624. Its totient is φ = 330156024.

The previous prime is 990748651. The next prime is 990748699. The reversal of 990748686 is 686847099.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1621 + ... + 44543.

It is an arithmetic number, because the mean of its divisors is an integer number (123878664).

Almost surely, 2^990748686 is an apocalyptic number.

990748686 is an abundant number, since it is smaller than the sum of its proper divisors (991309938).

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

990748686 is a wasteful number, since it uses less digits than its factorization.

990748686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46775.

The product of its (nonzero) digits is 5225472, while the sum is 57.

The square root of 990748686 is about 31476.1605981416. The cubic root of 990748686 is about 996.9066698416.

The spelling of 990748686 in words is "nine hundred ninety million, seven hundred forty-eight thousand, six hundred eighty-six".