22274920 has 32 divisors (see below), whose sum is σ = 50689800. Its totient is φ = 8808448.

The previous prime is 22274909. The next prime is 22274921. The reversal of 22274920 is 2947222.

It can be written as a sum of positive squares in 4 ways, for example, as 20484676 + 1790244 = 4526^2 + 1338^2 .

It is a super-2 number, since 2×22274920² = 992344122012800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22274921) 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 7 ways as a sum of consecutive naturals, for example, 432 + ... + 6688.

Almost surely, 2^22274920 is an apocalyptic number.

22274920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22274920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25344900).

22274920 is an abundant number, since it is smaller than the sum of its proper divisors (28414880).

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

22274920 is a wasteful number, since it uses less digits than its factorization.

22274920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357 (or 6353 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 22274920 is about 4719.6313415351. The cubic root of 22274920 is about 281.3662814647.

The spelling of 22274920 in words is "twenty-two million, two hundred seventy-four thousand, nine hundred twenty".