23122240 has 56 divisors (see below), whose sum is σ = 57972960. Its totient is φ = 8759808.

The previous prime is 23122219. The next prime is 23122241. The reversal of 23122240 is 4222132.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23122241) 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, 4179 + ... + 7981.

Almost surely, 2^23122240 is an apocalyptic number.

23122240 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 23122240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28986480).

23122240 is an abundant number, since it is smaller than the sum of its proper divisors (34850720).

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

23122240 is a wasteful number, since it uses less digits than its factorization.

23122240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839 (or 3829 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 23122240 is about 4808.5590357195. The cubic root of 23122240 is about 284.8896258761.

Adding to 23122240 its reverse (4222132), we get a palindrome (27344372).

The spelling of 23122240 in words is "twenty-three million, one hundred twenty-two thousand, two hundred forty".