23045440 has 56 divisors (see below), whose sum is σ = 59874912. Its totient is φ = 8378880.

The previous prime is 23045437. The next prime is 23045441. The reversal of 23045440 is 4454032.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23045441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247 + ... + 6793.

Almost surely, 2^23045440 is an apocalyptic number.

23045440 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 23045440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29937456).

23045440 is an abundant number, since it is smaller than the sum of its proper divisors (36829472).

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

23045440 is a wasteful number, since it uses less digits than its factorization.

23045440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6575 (or 6565 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 23045440 is about 4800.5666332215. The cubic root of 23045440 is about 284.5738578510.

Adding to 23045440 its reverse (4454032), we get a palindrome (27499472).

It can be divided in two parts, 2304 and 5440, that added together give a square (7744 = 88²).

The spelling of 23045440 in words is "twenty-three million, forty-five thousand, four hundred forty".