307540040 has 32 divisors (see below), whose sum is σ = 703314360. Its totient is φ = 120998400.

The previous prime is 307540033. The next prime is 307540043. The reversal of 307540040 is 40045703.

It can be written as a sum of positive squares in 4 ways, for example, as 264322564 + 43217476 = 16258^2 + 6574^2 .

It is a junction number, because it is equal to n+sod(n) for n = 307539988 and 307540015.

It is not an unprimeable number, because it can be changed into a prime (307540043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60581 + ... + 65460.

Almost surely, 2^307540040 is an apocalyptic number.

It is an amenable number.

307540040 is an abundant number, since it is smaller than the sum of its proper divisors (395774320).

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

307540040 is a wasteful number, since it uses less digits than its factorization.

307540040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126113 (or 126109 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 307540040 is about 17536.8195520168. The cubic root of 307540040 is about 674.9949995057.

Adding to 307540040 its reverse (40045703), we get a palindrome (347585743).

The spelling of 307540040 in words is "three hundred seven million, five hundred forty thousand, forty".