22190040 has 96 divisors (see below), whose sum is σ = 73541520. Its totient is φ = 5800704.

The previous prime is 22190039. The next prime is 22190053. The reversal of 22190040 is 4009122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22189995 and 22190022.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18499 + ... + 19661.

Almost surely, 2^22190040 is an apocalyptic number.

22190040 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 22190040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36770760).

22190040 is an abundant number, since it is smaller than the sum of its proper divisors (51351480).

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

22190040 is a wasteful number, since it uses less digits than its factorization.

22190040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233 (or 1226 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 22190040 is about 4710.6305310436. The cubic root of 22190040 is about 281.0084385117.

Adding to 22190040 its reverse (4009122), we get a palindrome (26199162).

The spelling of 22190040 in words is "twenty-two million, one hundred ninety thousand, forty".