22271040 has 336 divisors, whose sum is σ = 90342720. Its totient is φ = 4976640.

The previous prime is 22271027. The next prime is 22271083. The reversal of 22271040 is 4017222.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 601902 + ... + 601938.

Almost surely, 2^22271040 is an apocalyptic number.

22271040 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 22271040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45171360).

22271040 is an abundant number, since it is smaller than the sum of its proper divisors (68071680).

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

22271040 is a wasteful number, since it uses less digits than its factorization.

22271040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 22271040 is about 4719.2202745793. The cubic root of 22271040 is about 281.3499437395.

Adding to 22271040 its reverse (4017222), we get a palindrome (26288262).

The spelling of 22271040 in words is "twenty-two million, two hundred seventy-one thousand, forty".