22497940 has 48 divisors (see below), whose sum is σ = 49319424. Its totient is φ = 8611200.

The previous prime is 22497931. The next prime is 22497941. The reversal of 22497940 is 4979422.

It is a self number, because there is not a number n which added to its sum of digits gives 22497940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22497941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81082 + ... + 81358.

It is an arithmetic number, because the mean of its divisors is an integer number (1027488).

Almost surely, 2^22497940 is an apocalyptic number.

22497940 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 22497940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24659712).

22497940 is an abundant number, since it is smaller than the sum of its proper divisors (26821484).

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

22497940 is a wasteful number, since it uses less digits than its factorization.

22497940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 22497940 is about 4743.1993422162. The cubic root of 22497940 is about 282.3021926937.

It can be divided in two parts, 2 and 2497940, that added together give a palindrome (2497942).

The spelling of 22497940 in words is "twenty-two million, four hundred ninety-seven thousand, nine hundred forty".