40809194 has 8 divisors (see below), whose sum is σ = 61259520. Its totient is φ = 20389356.

The previous prime is 40809173. The next prime is 40809221. The reversal of 40809194 is 49190804.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3914 + ... + 9845.

It is an arithmetic number, because the mean of its divisors is an integer number (7657440).

Almost surely, 2^40809194 is an apocalyptic number.

40809194 is a deficient number, since it is larger than the sum of its proper divisors (20450326).

40809194 is a wasteful number, since it uses less digits than its factorization.

40809194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15244.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 40809194 is about 6388.2074167954. The cubic root of 40809194 is about 344.2859810886.

Adding to 40809194 its reverse (49190804), we get a palindrome (89999998).

The spelling of 40809194 in words is "forty million, eight hundred nine thousand, one hundred ninety-four".