40438444172 has 24 divisors (see below), whose sum is σ = 80881479840. Its totient is φ = 17329777920.

The previous prime is 40438444159. The next prime is 40438444183. The reversal of 40438444172 is 27144483404.

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, 689204 + ... + 745572.

It is an arithmetic number, because the mean of its divisors is an integer number (3370061660).

Almost surely, 2^40438444172 is an apocalyptic number.

It is an amenable number.

40438444172 is an abundant number, since it is smaller than the sum of its proper divisors (40443035668).

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

40438444172 is a wasteful number, since it uses less digits than its factorization.

40438444172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82001 (or 81999 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 41.

The spelling of 40438444172 in words is "forty billion, four hundred thirty-eight million, four hundred forty-four thousand, one hundred seventy-two".