307638260 has 12 divisors (see below), whose sum is σ = 646040388. Its totient is φ = 123055296.

The previous prime is 307638259. The next prime is 307638269. The reversal of 307638260 is 62836703.

It can be written as a sum of positive squares in 2 ways, for example, as 188348176 + 119290084 = 13724^2 + 10922^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 307638260.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307638269) 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, 7690937 + ... + 7690976.

It is an arithmetic number, because the mean of its divisors is an integer number (53836699).

Almost surely, 2^307638260 is an apocalyptic number.

It is an amenable number.

307638260 is an abundant number, since it is smaller than the sum of its proper divisors (338402128).

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

307638260 is a wasteful number, since it uses less digits than its factorization.

307638260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15381922 (or 15381920 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 307638260 is about 17539.6197222175. The cubic root of 307638260 is about 675.0668502607.

The spelling of 307638260 in words is "three hundred seven million, six hundred thirty-eight thousand, two hundred sixty".