990840074 has 24 divisors (see below), whose sum is σ = 1753278048. Its totient is φ = 418661880.

The previous prime is 990840049. The next prime is 990840077. The reversal of 990840074 is 470048099.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (990840077) by changing a digit.

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, 64244 + ... + 78159.

It is an arithmetic number, because the mean of its divisors is an integer number (73053252).

Almost surely, 2^990840074 is an apocalyptic number.

990840074 is a deficient number, since it is larger than the sum of its proper divisors (762437974).

990840074 is a wasteful number, since it uses less digits than its factorization.

990840074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142490 (or 142483 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 990840074 is about 31477.6122664982. The cubic root of 990840074 is about 996.9373209061.

The spelling of 990840074 in words is "nine hundred ninety million, eight hundred forty thousand, seventy-four".