40001044 has 6 divisors (see below), whose sum is σ = 70001834. Its totient is φ = 20000520.

The previous prime is 40001041. The next prime is 40001057. The reversal of 40001044 is 44010004.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21511044 + 18490000 = 4638^2 + 4300^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40001041) 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, 5000127 + ... + 5000134.

Almost surely, 2^40001044 is an apocalyptic number.

It is an amenable number.

40001044 is a deficient number, since it is larger than the sum of its proper divisors (30000790).

40001044 is a wasteful number, since it uses less digits than its factorization.

40001044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10000265 (or 10000263 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 40001044 is about 6324.6378552452. The cubic root of 40001044 is about 341.9981646676.

Adding to 40001044 its reverse (44010004), we get a palindrome (84011048).

The spelling of 40001044 in words is "forty million, one thousand, forty-four".