23140312 has 32 divisors (see below), whose sum is σ = 47209680. Its totient is φ = 10569600.

The previous prime is 23140283. The next prime is 23140319. The reversal of 23140312 is 21304132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23140319) 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, 9403 + ... + 11605.

Almost surely, 2^23140312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23140312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23604840).

23140312 is an abundant number, since it is smaller than the sum of its proper divisors (24069368).

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

23140312 is a wasteful number, since it uses less digits than its factorization.

23140312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323 (or 2319 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 23140312 is about 4810.4378179122. The cubic root of 23140312 is about 284.9638283836.

Adding to 23140312 its reverse (21304132), we get a palindrome (44444444).

The spelling of 23140312 in words is "twenty-three million, one hundred forty thousand, three hundred twelve".