40394205 has 12 divisors (see below), whose sum is σ = 70016700. Its totient is φ = 21543552.

The previous prime is 40394177. The next prime is 40394213. The reversal of 40394205 is 50249304.

It can be written as a sum of positive squares in 2 ways, for example, as 29877156 + 10517049 = 5466^2 + 3243^2 .

It is not a de Polignac number, because 40394205 - 2⁷ = 40394077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 448780 + ... + 448869.

It is an arithmetic number, because the mean of its divisors is an integer number (5834725).

Almost surely, 2^40394205 is an apocalyptic number.

40394205 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40394205 is a deficient number, since it is larger than the sum of its proper divisors (29622495).

40394205 is a wasteful number, since it uses less digits than its factorization.

40394205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897660 (or 897657 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 40394205 is about 6355.6435551406. The cubic root of 40394205 is about 343.1149872162.

The spelling of 40394205 in words is "forty million, three hundred ninety-four thousand, two hundred five".