44398889891 has 8 divisors (see below), whose sum is σ = 46354136064. Its totient is φ = 42445715400.

The previous prime is 44398889839. The next prime is 44398889893. The reversal of 44398889891 is 19898889344.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 44398889891 - 2⁶ = 44398889827 is a prime.

It is a super-2 number, since 2×44398889891² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44398889893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474035 + ... + 559916.

It is an arithmetic number, because the mean of its divisors is an integer number (5794267008).

Almost surely, 2^44398889891 is an apocalyptic number.

44398889891 is a deficient number, since it is larger than the sum of its proper divisors (1955246173).

44398889891 is a wasteful number, since it uses less digits than its factorization.

44398889891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035841.

The product of its digits is 143327232, while the sum is 71.

The spelling of 44398889891 in words is "forty-four billion, three hundred ninety-eight million, eight hundred eighty-nine thousand, eight hundred ninety-one".