23653540 has 12 divisors (see below), whose sum is σ = 49672476. Its totient is φ = 9461408.

The previous prime is 23653523. The next prime is 23653559. The reversal of 23653540 is 4535632.

It can be written as a sum of positive squares in 2 ways, for example, as 11778624 + 11874916 = 3432^2 + 3446^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23653499 and 23653508.

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, 591319 + ... + 591358.

It is an arithmetic number, because the mean of its divisors is an integer number (4139373).

Almost surely, 2^23653540 is an apocalyptic number.

23653540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23653540 is an abundant number, since it is smaller than the sum of its proper divisors (26018936).

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

23653540 is a wasteful number, since it uses less digits than its factorization.

23653540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182686 (or 1182684 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 23653540 is about 4863.4905160800. The cubic root of 23653540 is about 287.0551760112.

The spelling of 23653540 in words is "twenty-three million, six hundred fifty-three thousand, five hundred forty".