307680813 has 24 divisors (see below), whose sum is σ = 510350880. Its totient is φ = 176657760.

The previous prime is 307680803. The next prime is 307680869. The reversal of 307680813 is 318086703.

It is not a de Polignac number, because 307680813 - 2⁸ = 307680557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307680803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79906 + ... + 83667.

It is an arithmetic number, because the mean of its divisors is an integer number (21264620).

Almost surely, 2^307680813 is an apocalyptic number.

307680813 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

307680813 is a deficient number, since it is larger than the sum of its proper divisors (202670067).

307680813 is a wasteful number, since it uses less digits than its factorization.

307680813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163609 (or 163606 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 307680813 is about 17540.8327339383. The cubic root of 307680813 is about 675.0979742560.

The spelling of 307680813 in words is "three hundred seven million, six hundred eighty thousand, eight hundred thirteen".