22024240 has 80 divisors (see below), whose sum is σ = 59496192. Its totient is φ = 7425792.

The previous prime is 22024199. The next prime is 22024259. The reversal of 22024240 is 4242022.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37227 + ... + 37813.

Almost surely, 2^22024240 is an apocalyptic number.

22024240 is a gapful number since it is divisible by the number (20) 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 22024240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29748096).

22024240 is an abundant number, since it is smaller than the sum of its proper divisors (37471952).

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

22024240 is a wasteful number, since it uses less digits than its factorization.

22024240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 22024240 is about 4692.9990411250. Note that the first 3 decimals coincide. The cubic root of 22024240 is about 280.3068065548.

Adding to 22024240 its reverse (4242022), we get a palindrome (26266262).

The spelling of 22024240 in words is "twenty-two million, twenty-four thousand, two hundred forty".