2309640520 has 32 divisors (see below), whose sum is σ = 5669118720. Its totient is φ = 839869120.

The previous prime is 2309640517. The next prime is 2309640521. The reversal of 2309640520 is 250469032.

It is not an unprimeable number, because it can be changed into a prime (2309640521) 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, 2624152 + ... + 2625031.

It is an arithmetic number, because the mean of its divisors is an integer number (177159960).

Almost surely, 2^2309640520 is an apocalyptic number.

2309640520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2309640520 is an abundant number, since it is smaller than the sum of its proper divisors (3359478200).

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

2309640520 is a wasteful number, since it uses less digits than its factorization.

2309640520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5249205 (or 5249201 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 2309640520 is about 48058.7195002114. The cubic root of 2309640520 is about 1321.8478329361.

The spelling of 2309640520 in words is "two billion, three hundred nine million, six hundred forty thousand, five hundred twenty".