990788950 has 12 divisors (see below), whose sum is σ = 1842867540. Its totient is φ = 396315560.

The previous prime is 990788941. The next prime is 990788969. The reversal of 990788950 is 59887099.

It is a junction number, because it is equal to n+sod(n) for n = 990788891 and 990788900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9907840 + ... + 9907939.

It is an arithmetic number, because the mean of its divisors is an integer number (153572295).

Almost surely, 2^990788950 is an apocalyptic number.

990788950 is a deficient number, since it is larger than the sum of its proper divisors (852078590).

990788950 is a wasteful number, since it uses less digits than its factorization.

990788950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19815791 (or 19815786 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 55.

The square root of 990788950 is about 31476.8001868042. The cubic root of 990788950 is about 996.9201744121.

The spelling of 990788950 in words is "nine hundred ninety million, seven hundred eighty-eight thousand, nine hundred fifty".