40220042 has 16 divisors (see below), whose sum is σ = 62751240. Its totient is φ = 19310592.

The previous prime is 40220041. The next prime is 40220053. The reversal of 40220042 is 24002204.

It is a happy number.

40220042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 27050401 + 13169641 = 5201^2 + 3629^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40219999 and 40220026.

It is not an unprimeable number, because it can be changed into a prime (40220041) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9398 + ... + 12990.

Almost surely, 2^40220042 is an apocalyptic number.

40220042 is a deficient number, since it is larger than the sum of its proper divisors (22531198).

40220042 is a wasteful number, since it uses less digits than its factorization.

40220042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 40220042 is about 6341.9273095803. The cubic root of 40220042 is about 342.6211537928.

Adding to 40220042 its reverse (24002204), we get a palindrome (64222246).

The spelling of 40220042 in words is "forty million, two hundred twenty thousand, forty-two".