22428784 has 20 divisors (see below), whose sum is σ = 49663984. Its totient is φ = 9612288.

The previous prime is 22428781. The next prime is 22428787. The reversal of 22428784 is 48782422.

It is an interprime number because it is at equal distance from previous prime (22428781) and next prime (22428787).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22428781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100017 + ... + 100240.

Almost surely, 2^22428784 is an apocalyptic number.

It is an amenable number.

22428784 is an abundant number, since it is smaller than the sum of its proper divisors (27235200).

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

22428784 is a wasteful number, since it uses less digits than its factorization.

22428784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200272 (or 200266 counting only the distinct ones).

The product of its digits is 57344, while the sum is 37.

The square root of 22428784 is about 4735.9037152375. The cubic root of 22428784 is about 282.0126413192.

It can be divided in two parts, 2242 and 8784, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 22428784 in words is "twenty-two million, four hundred twenty-eight thousand, seven hundred eighty-four".