22438540 has 24 divisors (see below), whose sum is σ = 47224800. Its totient is φ = 8955648.

The previous prime is 22438511. The next prime is 22438553. The reversal of 22438540 is 4583422.

It is a junction number, because it is equal to n+sod(n) for n = 22438499 and 22438508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11044 + ... + 12916.

It is an arithmetic number, because the mean of its divisors is an integer number (1967700).

Almost surely, 2^22438540 is an apocalyptic number.

22438540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22438540 is an abundant number, since it is smaller than the sum of its proper divisors (24786260).

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

22438540 is a wasteful number, since it uses less digits than its factorization.

22438540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481 (or 2479 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 22438540 is about 4736.9336073034. The cubic root of 22438540 is about 282.0535250411.

The spelling of 22438540 in words is "twenty-two million, four hundred thirty-eight thousand, five hundred forty".