2309857636 has 12 divisors (see below), whose sum is σ = 4043790828. Its totient is φ = 1154488832.

The previous prime is 2309857621. The next prime is 2309857637. The reversal of 2309857636 is 6367589032.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 637865536 + 1671992100 = 25256^2 + 40890^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2309857636.

It is not an unprimeable number, because it can be changed into a prime (2309857637) 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, 98041 + ... + 119296.

It is an arithmetic number, because the mean of its divisors is an integer number (336982569).

Almost surely, 2^2309857636 is an apocalyptic number.

It is an amenable number.

2309857636 is a deficient number, since it is larger than the sum of its proper divisors (1733933192).

2309857636 is a wasteful number, since it uses less digits than its factorization.

2309857636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219998 (or 219996 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 49.

The square root of 2309857636 is about 48060.9783088110. The cubic root of 2309857636 is about 1321.8892514050.

The spelling of 2309857636 in words is "two billion, three hundred nine million, eight hundred fifty-seven thousand, six hundred thirty-six".