40440222 has 40 divisors (see below), whose sum is σ = 91502136. Its totient is φ = 13348368.

The previous prime is 40440221. The next prime is 40440259. The reversal of 40440222 is 22204404.

40440222 is a `hidden beast` number, since 4 + 0 + 440 + 222 = 666.

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 = 40440195 and 40440204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40440221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16168 + ... + 18500.

Almost surely, 2^40440222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40440222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45751068).

40440222 is an abundant number, since it is smaller than the sum of its proper divisors (51061914).

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

40440222 is a wasteful number, since it uses less digits than its factorization.

40440222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454 (or 2445 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 40440222 is about 6359.2626931115. The cubic root of 40440222 is about 343.2452297473.

Adding to 40440222 its reverse (22204404), we get a palindrome (62644626).

The spelling of 40440222 in words is "forty million, four hundred forty thousand, two hundred twenty-two".