40422042 has 24 divisors (see below), whose sum is σ = 87714900. Its totient is φ = 13453440.

The previous prime is 40422029. The next prime is 40422043. The reversal of 40422042 is 24022404.

40422042 is a `hidden beast` number, since 404 + 220 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40182921 + 239121 = 6339^2 + 489^2 .

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

It is not an unprimeable number, because it can be changed into a prime (40422043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14584 + ... + 17132.

Almost surely, 2^40422042 is an apocalyptic number.

40422042 is an abundant number, since it is smaller than the sum of its proper divisors (47292858).

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

40422042 is a wasteful number, since it uses less digits than its factorization.

40422042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438 (or 3435 counting only the distinct ones).

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

The square root of 40422042 is about 6357.8331214337. The cubic root of 40422042 is about 343.1937864622.

Adding to 40422042 its reverse (24022404), we get a palindrome (64444446).

It can be divided in two parts, 4042 and 2042, that added together give a square (6084 = 78²).

The spelling of 40422042 in words is "forty million, four hundred twenty-two thousand, forty-two".