40004242 has 16 divisors (see below), whose sum is σ = 61261920. Its totient is φ = 19586368.

The previous prime is 40004231. The next prime is 40004243. The reversal of 40004242 is 24240004.

It is not an unprimeable number, because it can be changed into a prime (40004243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40458 + ... + 41434.

It is an arithmetic number, because the mean of its divisors is an integer number (3828870).

Almost surely, 2^40004242 is an apocalyptic number.

40004242 is a deficient number, since it is larger than the sum of its proper divisors (21257678).

40004242 is a wasteful number, since it uses less digits than its factorization.

40004242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385.

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 40004242 is about 6324.8906709919. The cubic root of 40004242 is about 342.0072784379.

Adding to 40004242 its reverse (24240004), we get a palindrome (64244246).

The spelling of 40004242 in words is "forty million, four thousand, two hundred forty-two".