22338820 has 24 divisors (see below), whose sum is σ = 53613504. Its totient is φ = 7658976.

The previous prime is 22338791. The next prime is 22338847. The reversal of 22338820 is 2883322.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 79642 + ... + 79921.

It is an arithmetic number, because the mean of its divisors is an integer number (2233896).

Almost surely, 2^22338820 is an apocalyptic number.

22338820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22338820 is an abundant number, since it is smaller than the sum of its proper divisors (31274684).

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

22338820 is a wasteful number, since it uses less digits than its factorization.

22338820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159579 (or 159577 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 22338820 is about 4726.3960900458. The cubic root of 22338820 is about 281.6350761501.

The spelling of 22338820 in words is "twenty-two million, three hundred thirty-eight thousand, eight hundred twenty".