2309823640 has 32 divisors (see below), whose sum is σ = 5364754560. Its totient is φ = 894124800.

The previous prime is 2309823623. The next prime is 2309823661. The reversal of 2309823640 is 463289032.

It is a super-3 number, since 3×2309823640³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2309823640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 930141 + ... + 932620.

It is an arithmetic number, because the mean of its divisors is an integer number (167648580).

Almost surely, 2^2309823640 is an apocalyptic number.

2309823640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2309823640 is an abundant number, since it is smaller than the sum of its proper divisors (3054930920).

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

2309823640 is a wasteful number, since it uses less digits than its factorization.

2309823640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862803 (or 1862799 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 2309823640 is about 48060.6246318127. The cubic root of 2309823640 is about 1321.8827662770.

The spelling of 2309823640 in words is "two billion, three hundred nine million, eight hundred twenty-three thousand, six hundred forty".