44390638012 has 144 divisors (see below), whose sum is σ = 93807262080. Its totient is φ = 18318883968.

The previous prime is 44390638007. The next prime is 44390638031. The reversal of 44390638012 is 21083609344.

It is a happy number.

It is a super-2 number, since 2×44390638012² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151503738 + ... + 151504030.

It is an arithmetic number, because the mean of its divisors is an integer number (651439320).

Almost surely, 2^44390638012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44390638012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46903631040).

44390638012 is an abundant number, since it is smaller than the sum of its proper divisors (49416624068).

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

44390638012 is a wasteful number, since it uses less digits than its factorization.

44390638012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 44390638012 in words is "forty-four billion, three hundred ninety million, six hundred thirty-eight thousand, twelve".