22409424 has 30 divisors (see below), whose sum is σ = 62715666. Its totient is φ = 7469760.

The previous prime is 22409393. The next prime is 22409437. The reversal of 22409424 is 42490422.

It can be written as a sum of positive squares in only one way, i.e., 21344400 + 1065024 = 4620^2 + 1032^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77667 + ... + 77954.

Almost surely, 2^22409424 is an apocalyptic number.

22409424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22409424 is an abundant number, since it is smaller than the sum of its proper divisors (40306242).

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

22409424 is a wasteful number, since it uses less digits than its factorization.

22409424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155635 (or 155626 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 22409424 is about 4733.8593134989. The cubic root of 22409424 is about 281.9314757300.

Adding to 22409424 its reverse (42490422), we get a palindrome (64899846).

It can be divided in two parts, 2240 and 9424, that added together give a square (11664 = 108²).

The spelling of 22409424 in words is "twenty-two million, four hundred nine thousand, four hundred twenty-four".