40440004 has 24 divisors (see below), whose sum is σ = 77370048. Its totient is φ = 18342240.

The previous prime is 40439977. The next prime is 40440013. The reversal of 40440004 is 40004404.

It is a self number, because there is not a number n which added to its sum of digits gives 40440004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32074 + ... + 33310.

It is an arithmetic number, because the mean of its divisors is an integer number (3223752).

Almost surely, 2^40440004 is an apocalyptic number.

40440004 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40440004 is a deficient number, since it is larger than the sum of its proper divisors (36930044).

40440004 is a wasteful number, since it uses less digits than its factorization.

40440004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995 (or 1993 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 40440004 is about 6359.2455527366. The cubic root of 40440004 is about 343.2446129720.

Adding to 40440004 its reverse (40004404), we get a palindrome (80444408).

Subtracting from 40440004 its reverse (40004404), we obtain a square (435600 = 660²).

It can be divided in two parts, 40 and 440004, that added together give a palindrome (440044).

The spelling of 40440004 in words is "forty million, four hundred forty thousand, four".