23345540 has 12 divisors (see below), whose sum is σ = 49025676. Its totient is φ = 9338208.

The previous prime is 23345513. The next prime is 23345563. The reversal of 23345540 is 4554332.

It can be written as a sum of positive squares in 2 ways, for example, as 14500864 + 8844676 = 3808^2 + 2974^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 583619 + ... + 583658.

It is an arithmetic number, because the mean of its divisors is an integer number (4085473).

Almost surely, 2^23345540 is an apocalyptic number.

23345540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23345540 is an abundant number, since it is smaller than the sum of its proper divisors (25680136).

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

23345540 is a wasteful number, since it uses less digits than its factorization.

23345540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167286 (or 1167284 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 23345540 is about 4831.7222602298. The cubic root of 23345540 is about 285.8037841051.

Adding to 23345540 its reverse (4554332), we get a palindrome (27899872).

The spelling of 23345540 in words is "twenty-three million, three hundred forty-five thousand, five hundred forty".