40011994 has 8 divisors (see below), whose sum is σ = 65474208. Its totient is φ = 18187260.

The previous prime is 40011991. The next prime is 40012001. The reversal of 40011994 is 49911004.

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

It is not an unprimeable number, because it can be changed into a prime (40011991) 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 3 ways as a sum of consecutive naturals, for example, 909342 + ... + 909385.

It is an arithmetic number, because the mean of its divisors is an integer number (8184276).

Almost surely, 2^40011994 is an apocalyptic number.

40011994 is a deficient number, since it is larger than the sum of its proper divisors (25462214).

40011994 is a wasteful number, since it uses less digits than its factorization.

40011994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818740.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 40011994 is about 6325.5034582237. The cubic root of 40011994 is about 342.0293683385.

Adding to 40011994 its reverse (49911004), we get a palindrome (89922998).

It can be divided in two parts, 4001 and 1994, that added together give a palindrome (5995).

The spelling of 40011994 in words is "forty million, eleven thousand, nine hundred ninety-four".