40440404 has 12 divisors (see below), whose sum is σ = 70828128. Its totient is φ = 20203800.

The previous prime is 40440403. The next prime is 40440419. The reversal of 40440404 is 40404404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40440401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2699 + ... + 9389.

It is an arithmetic number, because the mean of its divisors is an integer number (5902344).

Almost surely, 2^40440404 is an apocalyptic number.

It is an amenable number.

40440404 is a deficient number, since it is larger than the sum of its proper divisors (30387724).

40440404 is a wasteful number, since it uses less digits than its factorization.

40440404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8206 (or 8204 counting only the distinct ones).

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

The square root of 40440404 is about 6359.2770029304. The cubic root of 40440404 is about 343.2457446682.

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

The spelling of 40440404 in words is "forty million, four hundred forty thousand, four hundred four".