309000680 has 16 divisors (see below), whose sum is σ = 695251620. Its totient is φ = 123600256.

The previous prime is 309000673. The next prime is 309000683. The reversal of 309000680 is 86000903.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 304781764 + 4218916 = 17458^2 + 2054^2 .

It is not an unprimeable number, because it can be changed into a prime (309000683) 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, 3862469 + ... + 3862548.

Almost surely, 2^309000680 is an apocalyptic number.

It is an amenable number.

309000680 is an abundant number, since it is smaller than the sum of its proper divisors (386250940).

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

309000680 is a wasteful number, since it uses less digits than its factorization.

309000680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7725028 (or 7725024 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 309000680 is about 17578.4151731605. The cubic root of 309000680 is about 676.0619260987.

The spelling of 309000680 in words is "three hundred nine million, six hundred eighty", and thus it is an aban number.