22438420 has 24 divisors (see below), whose sum is σ = 48642048. Its totient is φ = 8685600.

The previous prime is 22438399. The next prime is 22438421. The reversal of 22438420 is 2483422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22438421) 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, 17476 + ... + 18715.

It is an arithmetic number, because the mean of its divisors is an integer number (2026752).

Almost surely, 2^22438420 is an apocalyptic number.

22438420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22438420 is an abundant number, since it is smaller than the sum of its proper divisors (26203628).

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

22438420 is a wasteful number, since it uses less digits than its factorization.

22438420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36231 (or 36229 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 22438420 is about 4736.9209408644. The cubic root of 22438420 is about 282.0530222383.

The spelling of 22438420 in words is "twenty-two million, four hundred thirty-eight thousand, four hundred twenty".