23452540 has 24 divisors (see below), whose sum is σ = 49350672. Its totient is φ = 9361920.

The previous prime is 23452531. The next prime is 23452547. The reversal of 23452540 is 4525432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23452547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12972 + ... + 14668.

It is an arithmetic number, because the mean of its divisors is an integer number (2056278).

Almost surely, 2^23452540 is an apocalyptic number.

23452540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23452540 is an abundant number, since it is smaller than the sum of its proper divisors (25898132).

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

23452540 is a wasteful number, since it uses less digits than its factorization.

23452540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397 (or 2395 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 23452540 is about 4842.7822581652. The cubic root of 23452540 is about 286.2397617792.

Adding to 23452540 its reverse (4525432), we get a palindrome (27977972).

The spelling of 23452540 in words is "twenty-three million, four hundred fifty-two thousand, five hundred forty".