22273784 has 32 divisors (see below), whose sum is σ = 45726240. Its totient is φ = 10108800.

The previous prime is 22273781. The next prime is 22273789. The reversal of 22273784 is 48737222.

It is a super-2 number, since 2×22273784² = 992242907357312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22273781) 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, 4589 + ... + 8099.

It is an arithmetic number, because the mean of its divisors is an integer number (1428945).

Almost surely, 2^22273784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22273784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22863120).

22273784 is an abundant number, since it is smaller than the sum of its proper divisors (23452456).

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

22273784 is a wasteful number, since it uses less digits than its factorization.

22273784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3591 (or 3587 counting only the distinct ones).

The product of its digits is 37632, while the sum is 35.

The square root of 22273784 is about 4719.5109916177. The cubic root of 22273784 is about 281.3614982447.

The spelling of 22273784 in words is "twenty-two million, two hundred seventy-three thousand, seven hundred eighty-four".