23235840 has 108 divisors (see below), whose sum is σ = 80433444. Its totient is φ = 6193152.

The previous prime is 23235829. The next prime is 23235847. The reversal of 23235840 is 4853232.

It can be written as a sum of positive squares in 2 ways, for example, as 14379264 + 8856576 = 3792^2 + 2976^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23235847) 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, 10512 + ... + 12528.

Almost surely, 2^23235840 is an apocalyptic number.

23235840 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 23235840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40216722).

23235840 is an abundant number, since it is smaller than the sum of its proper divisors (57197604).

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

23235840 is a wasteful number, since it uses less digits than its factorization.

23235840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044 (or 2027 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 23235840 is about 4820.3568332645. The cubic root of 23235840 is about 285.3554199186.

The spelling of 23235840 in words is "twenty-three million, two hundred thirty-five thousand, eight hundred forty".