22238820 has 48 divisors (see below), whose sum is σ = 69189120. Its totient is φ = 5930208.

The previous prime is 22238819. The next prime is 22238891. The reversal of 22238820 is 2883222.

It is a super-2 number, since 2×22238820² = 989130229984800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20052 + ... + 21131.

It is an arithmetic number, because the mean of its divisors is an integer number (1441440).

Almost surely, 2^22238820 is an apocalyptic number.

22238820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22238820 is an abundant number, since it is smaller than the sum of its proper divisors (46950300).

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

22238820 is a wasteful number, since it uses less digits than its factorization.

22238820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41201 (or 41193 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 22238820 is about 4715.8053394940. The cubic root of 22238820 is about 281.2141998877.

The spelling of 22238820 in words is "twenty-two million, two hundred thirty-eight thousand, eight hundred twenty".