23240140 has 48 divisors (see below), whose sum is σ = 60850944. Its totient is φ = 7243200.

The previous prime is 23240131. The next prime is 23240149. The reversal of 23240140 is 4104232.

It is an interprime number because it is at equal distance from previous prime (23240131) and next prime (23240149).

It is not an unprimeable number, because it can be changed into a prime (23240149) 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 15 ways as a sum of consecutive naturals, for example, 6006 + ... + 9085.

It is an arithmetic number, because the mean of its divisors is an integer number (1267728).

Almost surely, 2^23240140 is an apocalyptic number.

23240140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23240140 is an abundant number, since it is smaller than the sum of its proper divisors (37610804).

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

23240140 is a wasteful number, since it uses less digits than its factorization.

23240140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15118 (or 15116 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 23240140 is about 4820.8028377025. The cubic root of 23240140 is about 285.3730213570.

Adding to 23240140 its reverse (4104232), we get a palindrome (27344372).

The spelling of 23240140 in words is "twenty-three million, two hundred forty thousand, one hundred forty".