990393608 has 8 divisors (see below), whose sum is σ = 1856988030. Its totient is φ = 495196800.

The previous prime is 990393553. The next prime is 990393631. The reversal of 990393608 is 806393099.

It can be written as a sum of positive squares in only one way, i.e., 967334404 + 23059204 = 31102^2 + 4802^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61899593 + ... + 61899608.

Almost surely, 2^990393608 is an apocalyptic number.

It is an amenable number.

990393608 is a deficient number, since it is larger than the sum of its proper divisors (866594422).

990393608 is a wasteful number, since it uses less digits than its factorization.

990393608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123799207 (or 123799203 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 990393608 is about 31470.5196652359. The cubic root of 990393608 is about 996.7875606171.

The spelling of 990393608 in words is "nine hundred ninety million, three hundred ninety-three thousand, six hundred eight".