22243788 has 48 divisors (see below), whose sum is σ = 65909760. Its totient is φ = 6355152.

The previous prime is 22243787. The next prime is 22243801. The reversal of 22243788 is 88734222.

It is a super-2 number, since 2×22243788² = 989572209177888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (22243787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13956 + ... + 15467.

It is an arithmetic number, because the mean of its divisors is an integer number (1373120).

Almost surely, 2^22243788 is an apocalyptic number.

22243788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22243788 is an abundant number, since it is smaller than the sum of its proper divisors (43665972).

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

22243788 is a wasteful number, since it uses less digits than its factorization.

22243788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29443 (or 29435 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 22243788 is about 4716.3320493791. The cubic root of 22243788 is about 281.2351387703.

The spelling of 22243788 in words is "twenty-two million, two hundred forty-three thousand, seven hundred eighty-eight".