990000680 has 16 divisors (see below), whose sum is σ = 2227501620. Its totient is φ = 396000256.

The previous prime is 990000679. The next prime is 990000689. The reversal of 990000680 is 86000099.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 986839396 + 3161284 = 31414^2 + 1778^2 .

It is not an unprimeable number, because it can be changed into a prime (990000689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12374969 + ... + 12375048.

Almost surely, 2^990000680 is an apocalyptic number.

It is an amenable number.

990000680 is an abundant number, since it is smaller than the sum of its proper divisors (1237500940).

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

990000680 is a wasteful number, since it uses less digits than its factorization.

990000680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24750028 (or 24750024 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 990000680 is about 31464.2762510120. The cubic root of 990000680 is about 996.6557216030.

The spelling of 990000680 in words is "nine hundred ninety million, six hundred eighty", and thus it is an aban number.