440039940 has 24 divisors (see below), whose sum is σ = 1232112000. Its totient is φ = 117343968.

The previous prime is 440039923. The next prime is 440039959. The reversal of 440039940 is 49930044.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3666940 + ... + 3667059.

It is an arithmetic number, because the mean of its divisors is an integer number (51338000).

Almost surely, 2^440039940 is an apocalyptic number.

It is an amenable number.

440039940 is an abundant number, since it is smaller than the sum of its proper divisors (792072060).

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

440039940 is a wasteful number, since it uses less digits than its factorization.

440039940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7334011 (or 7334009 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 440039940 is about 20977.1289741947. The cubic root of 440039940 is about 760.6135050804.

Adding to 440039940 its reverse (49930044), we get a palindrome (489969984).

The spelling of 440039940 in words is "four hundred forty million, thirty-nine thousand, nine hundred forty".