23445840 has 160 divisors (see below), whose sum is σ = 80994816. Its totient is φ = 5562880.

The previous prime is 23445817. The next prime is 23445847. The reversal of 23445840 is 4854432.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 23445798 and 23445807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23445847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219067 + ... + 219173.

Almost surely, 2^23445840 is an apocalyptic number.

23445840 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 23445840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40497408).

23445840 is an abundant number, since it is smaller than the sum of its proper divisors (57548976).

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

23445840 is a wasteful number, since it uses less digits than its factorization.

23445840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 23445840 is about 4842.0904576433. The cubic root of 23445840 is about 286.2125012059.

The spelling of 23445840 in words is "twenty-three million, four hundred forty-five thousand, eight hundred forty".