307240 has 16 divisors (see below), whose sum is σ = 691380. Its totient is φ = 122880.

The previous prime is 307201. The next prime is 307243. The reversal of 307240 is 42703.

It can be written as a sum of positive squares in 2 ways, for example, as 306916 + 324 = 554^2 + 18^2 .

It is not an unprimeable number, because it can be changed into a prime (307243) 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, 3801 + ... + 3880.

2³⁰⁷²⁴⁰ is an apocalyptic number.

It is an amenable number.

307240 is an abundant number, since it is smaller than the sum of its proper divisors (384140).

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

307240 is a wasteful number, since it uses less digits than its factorization.

307240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7692 (or 7688 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 307240 is about 554.2923416393. The cubic root of 307240 is about 67.4775416827.

Adding to 307240 its reverse (42703), we get a palindrome (349943).

The spelling of 307240 in words is "three hundred seven thousand, two hundred forty", and thus it is an iban number.