23540340 has 24 divisors (see below), whose sum is σ = 65913120. Its totient is φ = 6277408.

The previous prime is 23540333. The next prime is 23540347. The reversal of 23540340 is 4304532.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23540333) and next prime (23540347).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23540347) 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 7 ways as a sum of consecutive naturals, for example, 196110 + ... + 196229.

It is an arithmetic number, because the mean of its divisors is an integer number (2746380).

Almost surely, 2^23540340 is an apocalyptic number.

23540340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23540340 is an abundant number, since it is smaller than the sum of its proper divisors (42372780).

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

23540340 is a wasteful number, since it uses less digits than its factorization.

23540340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392351 (or 392349 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 23540340 is about 4851.8388266718. The cubic root of 23540340 is about 286.5965185009.

Adding to 23540340 its reverse (4304532), we get a palindrome (27844872).

The spelling of 23540340 in words is "twenty-three million, five hundred forty thousand, three hundred forty".