22363440 has 160 divisors (see below), whose sum is σ = 77780736. Its totient is φ = 5268480.

The previous prime is 22363433. The next prime is 22363487. The reversal of 22363440 is 4436322.

It is a happy number.

It is a Cunningham number, because it is equal to 4729²-1.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22363440.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113422 + ... + 113618.

Almost surely, 2^22363440 is an apocalyptic number.

22363440 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 22363440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38890368).

22363440 is an abundant number, since it is smaller than the sum of its proper divisors (55417296).

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

22363440 is a wasteful number, since it uses less digits than its factorization.

22363440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 22363440 is about 4728.9998942694. Note that the first 3 decimals coincide. The cubic root of 22363440 is about 281.7385031264.

Adding to 22363440 its reverse (4436322), we get a palindrome (26799762).

The spelling of 22363440 in words is "twenty-two million, three hundred sixty-three thousand, four hundred forty".