23723540 has 24 divisors (see below), whose sum is σ = 50505000. Its totient is φ = 9358848.

The previous prime is 23723527. The next prime is 23723563. The reversal of 23723540 is 4532732.

It can be written as a sum of positive squares in 4 ways, for example, as 3671056 + 20052484 = 1916^2 + 4478^2 .

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, 6665 + ... + 9584.

It is an arithmetic number, because the mean of its divisors is an integer number (2104375).

Almost surely, 2^23723540 is an apocalyptic number.

23723540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23723540 is an abundant number, since it is smaller than the sum of its proper divisors (26781460).

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

23723540 is a wasteful number, since it uses less digits than its factorization.

23723540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16331 (or 16329 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 23723540 is about 4870.6816771372. The cubic root of 23723540 is about 287.3380663383.

The spelling of 23723540 in words is "twenty-three million, seven hundred twenty-three thousand, five hundred forty".