40404405 has 16 divisors (see below), whose sum is σ = 65534400. Its totient is φ = 21253248.

The previous prime is 40404389. The next prime is 40404409. The reversal of 40404405 is 50440404.

It is not a de Polignac number, because 40404405 - 2⁴ = 40404389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40404409) 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, 17355 + ... + 19544.

It is an arithmetic number, because the mean of its divisors is an integer number (4095900).

Almost surely, 2^40404405 is an apocalyptic number.

It is an amenable number.

40404405 is a deficient number, since it is larger than the sum of its proper divisors (25129995).

40404405 is a wasteful number, since it uses less digits than its factorization.

40404405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36980.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 40404405 is about 6356.4459409327. The cubic root of 40404405 is about 343.1438649420.

Adding to 40404405 its reverse (50440404), we get a palindrome (90844809).

The spelling of 40404405 in words is "forty million, four hundred four thousand, four hundred five".