22441428 has 72 divisors (see below), whose sum is σ = 61891200. Its totient is φ = 7030656.

The previous prime is 22441379. The next prime is 22441459. The reversal of 22441428 is 82414422.

22441428 is a `hidden beast` number, since 224 + 414 + 28 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30853 + ... + 31571.

It is an arithmetic number, because the mean of its divisors is an integer number (859600).

Almost surely, 2^22441428 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 22441428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30945600).

22441428 is an abundant number, since it is smaller than the sum of its proper divisors (39449772).

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

22441428 is a wasteful number, since it uses less digits than its factorization.

22441428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 741 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 22441428 is about 4737.2384360511. The cubic root of 22441428 is about 282.0656252882.

The spelling of 22441428 in words is "twenty-two million, four hundred forty-one thousand, four hundred twenty-eight".