23312140 has 24 divisors (see below), whose sum is σ = 49648032. Its totient is φ = 9192960.

The previous prime is 23312131. The next prime is 23312147. The reversal of 23312140 is 4121332.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (23312147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6789 + ... + 9628.

It is an arithmetic number, because the mean of its divisors is an integer number (2068668).

Almost surely, 2^23312140 is an apocalyptic number.

23312140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23312140 is an abundant number, since it is smaller than the sum of its proper divisors (26335892).

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

23312140 is a wasteful number, since it uses less digits than its factorization.

23312140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16497 (or 16495 counting only the distinct ones).

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

The square root of 23312140 is about 4828.2646986262. The cubic root of 23312140 is about 285.6674211229.

Adding to 23312140 its reverse (4121332), we get a palindrome (27433472).

The spelling of 23312140 in words is "twenty-three million, three hundred twelve thousand, one hundred forty".