40808739 has 8 divisors (see below), whose sum is σ = 56777472. Its totient is φ = 26022920.

The previous prime is 40808723. The next prime is 40808753. The reversal of 40808739 is 93780804.

40808739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40808739 - 2⁴ = 40808723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40808697 and 40808706.

It is not an unprimeable number, because it can be changed into a prime (40808759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295647 + ... + 295784.

It is an arithmetic number, because the mean of its divisors is an integer number (7097184).

Almost surely, 2^40808739 is an apocalyptic number.

40808739 is a deficient number, since it is larger than the sum of its proper divisors (15968733).

40808739 is a wasteful number, since it uses less digits than its factorization.

40808739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591457.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 40808739 is about 6388.1718042019. The cubic root of 40808739 is about 344.2847015509.

The spelling of 40808739 in words is "forty million, eight hundred eight thousand, seven hundred thirty-nine".