22402240 has 112 divisors (see below), whose sum is σ = 62252352. Its totient is φ = 7520256.

The previous prime is 22402223. The next prime is 22402271. The reversal of 22402240 is 4220422.

It is a tau number, because it is divible by the number of its divisors (112).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163452 + ... + 163588.

Almost surely, 2^22402240 is an apocalyptic number.

22402240 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 22402240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31126176).

22402240 is an abundant number, since it is smaller than the sum of its proper divisors (39850112).

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

22402240 is a wasteful number, since it uses less digits than its factorization.

22402240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 224 counting only the distinct ones).

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

The square root of 22402240 is about 4733.1004637552. The cubic root of 22402240 is about 281.9013453677.

Adding to 22402240 its reverse (4220422), we get a palindrome (26622662).

The spelling of 22402240 in words is "twenty-two million, four hundred two thousand, two hundred forty".