40789817 has 6 divisors (see below), whose sum is σ = 43217118. Its totient is φ = 38365632.

The previous prime is 40789753. The next prime is 40789829. The reversal of 40789817 is 71898704.

It can be written as a sum of positive squares in 3 ways, for example, as 5494336 + 35295481 = 2344^2 + 5941^2 .

It is not a de Polignac number, because 40789817 - 2⁶ = 40789753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40789877) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25559 + ... + 27107.

It is an arithmetic number, because the mean of its divisors is an integer number (7202853).

Almost surely, 2^40789817 is an apocalyptic number.

It is an amenable number.

40789817 is a deficient number, since it is larger than the sum of its proper divisors (2427301).

40789817 is an frugal number, since it uses more digits than its factorization.

40789817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3115 (or 1566 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 40789817 is about 6386.6906140818. The cubic root of 40789817 is about 344.2314812324.

The spelling of 40789817 in words is "forty million, seven hundred eighty-nine thousand, eight hundred seventeen".