40809839 has 8 divisors (see below), whose sum is σ = 46827648. Its totient is φ = 34839000.

The previous prime is 40809829. The next prime is 40809851. The reversal of 40809839 is 93890804.

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

It is not a de Polignac number, because 40809839 - 2⁴ = 40809823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40809796 and 40809805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40809829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9857 + ... + 13370.

It is an arithmetic number, because the mean of its divisors is an integer number (5853456).

Almost surely, 2^40809839 is an apocalyptic number.

40809839 is a deficient number, since it is larger than the sum of its proper divisors (6017809).

40809839 is a wasteful number, since it uses less digits than its factorization.

40809839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23485.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 40809839 is about 6388.2579002417. The cubic root of 40809839 is about 344.2877949224.

The spelling of 40809839 in words is "forty million, eight hundred nine thousand, eight hundred thirty-nine".