40684405 has 4 divisors (see below), whose sum is σ = 48821292. Its totient is φ = 32547520.

The previous prime is 40684381. The next prime is 40684411. The reversal of 40684405 is 50448604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26801329 + 13883076 = 5177^2 + 3726^2 .

It is not a de Polignac number, because 40684405 - 2⁹ = 40683893 is a prime.

It is a Duffinian number.

It is a congruent 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, 4068436 + ... + 4068445.

It is an arithmetic number, because the mean of its divisors is an integer number (12205323).

Almost surely, 2^40684405 is an apocalyptic number.

It is an amenable number.

40684405 is a deficient number, since it is larger than the sum of its proper divisors (8136887).

40684405 is an equidigital number, since it uses as much as digits as its factorization.

40684405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8136886.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 40684405 is about 6378.4328012451. The cubic root of 40684405 is about 343.9346961173.

The spelling of 40684405 in words is "forty million, six hundred eighty-four thousand, four hundred five".