23542140 has 96 divisors (see below), whose sum is σ = 70398720. Its totient is φ = 5861376.

The previous prime is 23542139. The next prime is 23542153. The reversal of 23542140 is 4124532.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121884 + ... + 122076.

It is an arithmetic number, because the mean of its divisors is an integer number (733320).

Almost surely, 2^23542140 is an apocalyptic number.

23542140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23542140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35199360).

23542140 is an abundant number, since it is smaller than the sum of its proper divisors (46856580).

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

23542140 is a wasteful number, since it uses less digits than its factorization.

23542140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 23542140 is about 4852.0243198071. The cubic root of 23542140 is about 286.6038231332.

Adding to 23542140 its reverse (4124532), we get a palindrome (27666672).

The spelling of 23542140 in words is "twenty-three million, five hundred forty-two thousand, one hundred forty".