40423222 has 16 divisors (see below), whose sum is σ = 72944640. Its totient is φ = 16412328.

The previous prime is 40423219. The next prime is 40423223. The reversal of 40423222 is 22232404.

It is a super-2 number, since 2×40423222² = 3268073753722568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 40423222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75718 + ... + 76249.

It is an arithmetic number, because the mean of its divisors is an integer number (4559040).

Almost surely, 2^40423222 is an apocalyptic number.

40423222 is a deficient number, since it is larger than the sum of its proper divisors (32521418).

40423222 is a wasteful number, since it uses less digits than its factorization.

40423222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151995.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 40423222 is about 6357.9259196691. The cubic root of 40423222 is about 343.1971259334.

Adding to 40423222 its reverse (22232404), we get a palindrome (62655626).

The spelling of 40423222 in words is "forty million, four hundred twenty-three thousand, two hundred twenty-two".