22144528 has 40 divisors (see below), whose sum is σ = 49375808. Its totient is φ = 9424512.

The previous prime is 22144511. The next prime is 22144541. The reversal of 22144528 is 82544122.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 22144496 and 22144505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17650 + ... + 18862.

Almost surely, 2^22144528 is an apocalyptic number.

22144528 is a gapful number since it is divisible by the number (28) 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 22144528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24687904).

22144528 is an abundant number, since it is smaller than the sum of its proper divisors (27231280).

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

22144528 is a wasteful number, since it uses less digits than its factorization.

22144528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391 (or 1385 counting only the distinct ones).

The product of its digits is 5120, while the sum is 28.

The square root of 22144528 is about 4705.7972757015. The cubic root of 22144528 is about 280.8161899524.

It can be divided in two parts, 2214452 and 8, that added together give a triangular number (2214460 = T₂₁₀₄).

The spelling of 22144528 in words is "twenty-two million, one hundred forty-four thousand, five hundred twenty-eight".