615325240 has 16 divisors (see below), whose sum is σ = 1384481880. Its totient is φ = 246130080.

The previous prime is 615325237. The next prime is 615325261. The reversal of 615325240 is 42523516.

It is a junction number, because it is equal to n+sod(n) for n = 615325199 and 615325208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7691526 + ... + 7691605.

Almost surely, 2^615325240 is an apocalyptic number.

It is an amenable number.

615325240 is an abundant number, since it is smaller than the sum of its proper divisors (769156640).

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

615325240 is a wasteful number, since it uses less digits than its factorization.

615325240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15383142 (or 15383138 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 615325240 is about 24805.7501398365. The cubic root of 615325240 is about 850.5533835919.

Adding to 615325240 its reverse (42523516), we get a palindrome (657848756).

The spelling of 615325240 in words is "six hundred fifteen million, three hundred twenty-five thousand, two hundred forty".