40000444002 has 40 divisors (see below), whose sum is σ = 90336423936. Its totient is φ = 13228486488.

The previous prime is 40000443943. The next prime is 40000444021. The reversal of 40000444002 is 20044400004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 951538 + ... + 992685.

Almost surely, 2^40000444002 is an apocalyptic number.

40000444002 is an abundant number, since it is smaller than the sum of its proper divisors (50335979934).

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

40000444002 is a wasteful number, since it uses less digits than its factorization.

40000444002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944364 (or 1944355 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 40000444002 its reverse (20044400004), we get a palindrome (60044844006).

The spelling of 40000444002 in words is "forty billion, four hundred forty-four thousand, two".