23730540 has 24 divisors (see below), whose sum is σ = 66445680. Its totient is φ = 6328128.

The previous prime is 23730523. The next prime is 23730541. The reversal of 23730540 is 4503732.

It is a self number, because there is not a number n which added to its sum of digits gives 23730540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23730541) 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, 197695 + ... + 197814.

It is an arithmetic number, because the mean of its divisors is an integer number (2768570).

Almost surely, 2^23730540 is an apocalyptic number.

23730540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23730540 is an abundant number, since it is smaller than the sum of its proper divisors (42715140).

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

23730540 is a wasteful number, since it uses less digits than its factorization.

23730540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395521 (or 395519 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 23730540 is about 4871.4002093854. The cubic root of 23730540 is about 287.3663247498.

The spelling of 23730540 in words is "twenty-three million, seven hundred thirty thousand, five hundred forty".