40404404 has 6 divisors (see below), whose sum is σ = 70707714. Its totient is φ = 20202200.

The previous prime is 40404389. The next prime is 40404409. The reversal of 40404404 is 40440404.

It can be written as a sum of positive squares in only one way, i.e., 39664804 + 739600 = 6298^2 + 860^2 .

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050547 + ... + 5050554.

It is an arithmetic number, because the mean of its divisors is an integer number (11784619).

Almost surely, 2^40404404 is an apocalyptic number.

It is an amenable number.

40404404 is a deficient number, since it is larger than the sum of its proper divisors (30303310).

40404404 is a wasteful number, since it uses less digits than its factorization.

40404404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10101105 (or 10101103 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 40404404 is about 6356.4458622724. The cubic root of 40404404 is about 343.1438621111.

Adding to 40404404 its reverse (40440404), we get a palindrome (80844808).

The spelling of 40404404 in words is "forty million, four hundred four thousand, four hundred four".