990391700 has 36 divisors (see below), whose sum is σ = 2185589280. Its totient is φ = 389439840.

The previous prime is 990391687. The next prime is 990391711. The reversal of 990391700 is 7193099.

It is a happy number.

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 11 ways as a sum of consecutive naturals, for example, 78032 + ... + 89831.

Almost surely, 2^990391700 is an apocalyptic number.

It is an amenable number.

990391700 is an abundant number, since it is smaller than the sum of its proper divisors (1195197580).

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

990391700 is a wasteful number, since it uses less digits than its factorization.

990391700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167936 (or 167929 counting only the distinct ones).

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 990391700 is about 31470.4893511366. The cubic root of 990391700 is about 996.7869205107.

The spelling of 990391700 in words is "nine hundred ninety million, three hundred ninety-one thousand, seven hundred".