40402205 has 4 divisors (see below), whose sum is σ = 48482652. Its totient is φ = 32321760.

The previous prime is 40402177. The next prime is 40402253. The reversal of 40402205 is 50220404.

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 6692569 + 33709636 = 2587^2 + 5806^2 .

It is not a de Polignac number, because 40402205 - 2¹⁰ = 40401181 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, 4040216 + ... + 4040225.

It is an arithmetic number, because the mean of its divisors is an integer number (12120663).

Almost surely, 2^40402205 is an apocalyptic number.

It is an amenable number.

40402205 is a deficient number, since it is larger than the sum of its proper divisors (8080447).

40402205 is an equidigital number, since it uses as much as digits as its factorization.

40402205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8080446.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 40402205 is about 6356.2728858978. The cubic root of 40402205 is about 343.1376368240.

Adding to 40402205 its reverse (50220404), we get a palindrome (90622609).

The spelling of 40402205 in words is "forty million, four hundred two thousand, two hundred five".