40400444 has 12 divisors (see below), whose sum is σ = 80800944. Its totient is φ = 17314464.

The previous prime is 40400431. The next prime is 40400453. The reversal of 40400444 is 44400404.

40400444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

40400444 is an admirable number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 721409 + ... + 721464.

It is an arithmetic number, because the mean of its divisors is an integer number (6733412).

Almost surely, 2^40400444 is an apocalyptic number.

It is an amenable number.

40400444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40400444 is a wasteful number, since it uses less digits than its factorization.

40400444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442884 (or 1442882 counting only the distinct ones).

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

The square root of 40400444 is about 6356.1343598134. The cubic root of 40400444 is about 343.1326513357.

Adding to 40400444 its reverse (44400404), we get a palindrome (84800848).

The spelling of 40400444 in words is "forty million, four hundred thousand, four hundred forty-four".