40018042 has 8 divisors (see below), whose sum is σ = 60578100. Its totient is φ = 19825344.

The previous prime is 40018039. The next prime is 40018061. The reversal of 40018042 is 24081004.

It can be written as a sum of positive squares in 2 ways, for example, as 39955041 + 63001 = 6321^2 + 251^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 91567 + ... + 92002.

Almost surely, 2^40018042 is an apocalyptic number.

40018042 is a deficient number, since it is larger than the sum of its proper divisors (20560058).

40018042 is a wasteful number, since it uses less digits than its factorization.

40018042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183680.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 40018042 is about 6325.9815048734. The cubic root of 40018042 is about 342.0466005831.

Adding to 40018042 its reverse (24081004), we get a palindrome (64099046).

The spelling of 40018042 in words is "forty million, eighteen thousand, forty-two".