23605520 has 60 divisors (see below), whose sum is σ = 58358244. Its totient is φ = 8878080.

The previous prime is 23605513. The next prime is 23605523. The reversal of 23605520 is 2550632.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1628176 + 21977344 = 1276^2 + 4688^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23605523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22610 + ... + 23630.

Almost surely, 2^23605520 is an apocalyptic number.

23605520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23605520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29179122).

23605520 is an abundant number, since it is smaller than the sum of its proper divisors (34752724).

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

23605520 is a wasteful number, since it uses less digits than its factorization.

23605520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 23605520 is about 4858.5512243878. The cubic root of 23605520 is about 286.8607903341.

The spelling of 23605520 in words is "twenty-three million, six hundred five thousand, five hundred twenty".