40686403 has 4 divisors (see below), whose sum is σ = 40819240. Its totient is φ = 40553568.

The previous prime is 40686383. The next prime is 40686409. The reversal of 40686403 is 30468604.

40686403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40686403 - 2¹⁷ = 40555331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40686409) 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 3 ways as a sum of consecutive naturals, for example, 65958 + ... + 66571.

It is an arithmetic number, because the mean of its divisors is an integer number (10204810).

Almost surely, 2^40686403 is an apocalyptic number.

40686403 is a deficient number, since it is larger than the sum of its proper divisors (132837).

40686403 is a wasteful number, since it uses less digits than its factorization.

40686403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132836.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 40686403 is about 6378.5894208673. The cubic root of 40686403 is about 343.9403262048.

The spelling of 40686403 in words is "forty million, six hundred eighty-six thousand, four hundred three".