22431040 has 56 divisors (see below), whose sum is σ = 53839872. Its totient is φ = 8901120.

The previous prime is 22430987. The next prime is 22431047. The reversal of 22431040 is 4013422.

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 (22431047) 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, 60937 + ... + 61303.

Almost surely, 2^22431040 is an apocalyptic number.

22431040 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 22431040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26919936).

22431040 is an abundant number, since it is smaller than the sum of its proper divisors (31408832).

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

22431040 is a wasteful number, since it uses less digits than its factorization.

22431040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575 (or 565 counting only the distinct ones).

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

The square root of 22431040 is about 4736.1418897664. The cubic root of 22431040 is about 282.0220964192.

Adding to 22431040 its reverse (4013422), we get a palindrome (26444462).

The spelling of 22431040 in words is "twenty-two million, four hundred thirty-one thousand, forty".