22344540 has 24 divisors (see below), whose sum is σ = 62564880. Its totient is φ = 5958528.

The previous prime is 22344499. The next prime is 22344541. The reversal of 22344540 is 4544322.

It is a self number, because there is not a number n which added to its sum of digits gives 22344540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22344541) 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, 186145 + ... + 186264.

It is an arithmetic number, because the mean of its divisors is an integer number (2606870).

Almost surely, 2^22344540 is an apocalyptic number.

22344540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22344540 is an abundant number, since it is smaller than the sum of its proper divisors (40220340).

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

22344540 is a wasteful number, since it uses less digits than its factorization.

22344540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372421 (or 372419 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 22344540 is about 4727.0011635285. The cubic root of 22344540 is about 281.6591122623.

Adding to 22344540 its reverse (4544322), we get a palindrome (26888862).

The spelling of 22344540 in words is "twenty-two million, three hundred forty-four thousand, five hundred forty".