22031028 has 60 divisors (see below), whose sum is σ = 58270212. Its totient is φ = 7257600.

The previous prime is 22031027. The next prime is 22031057. The reversal of 22031028 is 82013022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14837904 + 7193124 = 3852^2 + 2682^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 22031028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22031027) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31078 + ... + 31778.

Almost surely, 2^22031028 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 22031028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29135106).

22031028 is an abundant number, since it is smaller than the sum of its proper divisors (36239184).

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

22031028 is a wasteful number, since it uses less digits than its factorization.

22031028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 22031028 is about 4693.7221903304. The cubic root of 22031028 is about 280.3356009977.

The spelling of 22031028 in words is "twenty-two million, thirty-one thousand, twenty-eight".