22623140 has 12 divisors (see below), whose sum is σ = 47508636. Its totient is φ = 9049248.

The previous prime is 22623119. The next prime is 22623143. The reversal of 22623140 is 4132622.

It can be written as a sum of positive squares in 2 ways, for example, as 13235044 + 9388096 = 3638^2 + 3064^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1131157 = 22623140 / (2 + 2 + 6 + 2 + 3 + 1 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (22623143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565559 + ... + 565598.

It is an arithmetic number, because the mean of its divisors is an integer number (3959053).

Almost surely, 2^22623140 is an apocalyptic number.

22623140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22623140 is an abundant number, since it is smaller than the sum of its proper divisors (24885496).

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

22623140 is a wasteful number, since it uses less digits than its factorization.

22623140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131166 (or 1131164 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 22623140 is about 4756.3788747323. The cubic root of 22623140 is about 282.8248905268.

Adding to 22623140 its reverse (4132622), we get a palindrome (26755762).

The spelling of 22623140 in words is "twenty-two million, six hundred twenty-three thousand, one hundred forty".