23130540 has 72 divisors (see below), whose sum is σ = 74299680. Its totient is φ = 5804544.

The previous prime is 23130521. The next prime is 23130553. The reversal of 23130540 is 4503132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 720 + ... + 6839.

It is an arithmetic number, because the mean of its divisors is an integer number (1031940).

Almost surely, 2^23130540 is an apocalyptic number.

23130540 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 23130540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37149840).

23130540 is an abundant number, since it is smaller than the sum of its proper divisors (51169140).

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

23130540 is a wasteful number, since it uses less digits than its factorization.

23130540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7591 (or 7586 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 23130540 is about 4809.4220026943. The cubic root of 23130540 is about 284.9237099587.

Adding to 23130540 its reverse (4503132), we get a palindrome (27633672).

The spelling of 23130540 in words is "twenty-three million, one hundred thirty thousand, five hundred forty".