23243140 has 24 divisors (see below), whose sum is σ = 49317912. Its totient is φ = 9200640.

The previous prime is 23243119. The next prime is 23243153. The reversal of 23243140 is 4134232.

It can be written as a sum of positive squares in 4 ways, for example, as 7354944 + 15888196 = 2712^2 + 3986^2 .

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, 4051 + ... + 7930.

It is an arithmetic number, because the mean of its divisors is an integer number (2054913).

Almost surely, 2^23243140 is an apocalyptic number.

23243140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23243140 is an abundant number, since it is smaller than the sum of its proper divisors (26074772).

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

23243140 is a wasteful number, since it uses less digits than its factorization.

23243140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12087 (or 12085 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 23243140 is about 4821.1139791546. The cubic root of 23243140 is about 285.3853001446.

Adding to 23243140 its reverse (4134232), we get a palindrome (27377372).

The spelling of 23243140 in words is "twenty-three million, two hundred forty-three thousand, one hundred forty".