990000656 has 10 divisors (see below), whose sum is σ = 1918126302. Its totient is φ = 495000320.

The previous prime is 990000647. The next prime is 990000679. The reversal of 990000656 is 656000099.

It can be written as a sum of positive squares in only one way, i.e., 519110656 + 470890000 = 22784^2 + 21700^2 .

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, 30937505 + ... + 30937536.

Almost surely, 2^990000656 is an apocalyptic number.

It is an amenable number.

990000656 is a deficient number, since it is larger than the sum of its proper divisors (928125646).

990000656 is a wasteful number, since it uses less digits than its factorization.

990000656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61875049 (or 61875043 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 990000656 is about 31464.2758696271. The cubic root of 990000656 is about 996.6557135492.

The spelling of 990000656 in words is "nine hundred ninety million, six hundred fifty-six", and thus it is an aban number.