23507540 has 24 divisors (see below), whose sum is σ = 56418432. Its totient is φ = 8059680.

The previous prime is 23507531. The next prime is 23507551. The reversal of 23507540 is 4570532.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83816 + ... + 84095.

It is an arithmetic number, because the mean of its divisors is an integer number (2350768).

Almost surely, 2^23507540 is an apocalyptic number.

23507540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23507540 is an abundant number, since it is smaller than the sum of its proper divisors (32910892).

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

23507540 is a wasteful number, since it uses less digits than its factorization.

23507540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167927 (or 167925 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 23507540 is about 4848.4574866652. The cubic root of 23507540 is about 286.4633466039.

The spelling of 23507540 in words is "twenty-three million, five hundred seven thousand, five hundred forty".