40808369 has 16 divisors (see below), whose sum is σ = 48706560. Its totient is φ = 33454080.

The previous prime is 40808359. The next prime is 40808377. The reversal of 40808369 is 96380804.

It is a cyclic number.

It is not a de Polignac number, because 40808369 - 2²⁴ = 24031153 is a prime.

It is a super-2 number, since 2×40808369² = 3330645960880322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40808359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18257 + ... + 20369.

It is an arithmetic number, because the mean of its divisors is an integer number (3044160).

Almost surely, 2^40808369 is an apocalyptic number.

It is an amenable number.

40808369 is a deficient number, since it is larger than the sum of its proper divisors (7898191).

40808369 is a wasteful number, since it uses less digits than its factorization.

40808369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 40808369 is about 6388.1428443641. The cubic root of 40808369 is about 344.2836610408.

The spelling of 40808369 in words is "forty million, eight hundred eight thousand, three hundred sixty-nine".