40605404 has 24 divisors (see below), whose sum is σ = 81489408. Its totient is φ = 17342640.

The previous prime is 40605403. The next prime is 40605407. The reversal of 40605404 is 40450604.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 40605404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40605403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6377 + ... + 11039.

It is an arithmetic number, because the mean of its divisors is an integer number (3395392).

Almost surely, 2^40605404 is an apocalyptic number.

It is an amenable number.

40605404 is an abundant number, since it is smaller than the sum of its proper divisors (40884004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40605404 is a wasteful number, since it uses less digits than its factorization.

40605404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4985 (or 4983 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40605404 is about 6372.2369698560. The cubic root of 40605404 is about 343.7119343414.

The spelling of 40605404 in words is "forty million, six hundred five thousand, four hundred four".