307039640 has 16 divisors (see below), whose sum is σ = 690839280. Its totient is φ = 122815840.

The previous prime is 307039637. The next prime is 307039643. The reversal of 307039640 is 46930703.

307039640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (307039637) and next prime (307039643).

It is a junction number, because it is equal to n+sod(n) for n = 307039597 and 307039606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307039643) 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, 3837956 + ... + 3838035.

It is an arithmetic number, because the mean of its divisors is an integer number (43177455).

Almost surely, 2^307039640 is an apocalyptic number.

It is an amenable number.

307039640 is an abundant number, since it is smaller than the sum of its proper divisors (383799640).

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

307039640 is a wasteful number, since it uses less digits than its factorization.

307039640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7676002 (or 7675998 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 307039640 is about 17522.5466185712. The cubic root of 307039640 is about 674.6287048080.

The spelling of 307039640 in words is "three hundred seven million, thirty-nine thousand, six hundred forty".