44189840385 has 56 divisors (see below), whose sum is σ = 81444772584. Its totient is φ = 22993009920.

The previous prime is 44189840209. The next prime is 44189840389. The reversal of 44189840385 is 58304898144.

It is a happy number.

44189840385 is a `hidden beast` number, since 4 + 4 + 189 + 84 + 0 + 385 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5096246544 + 39093593841 = 71388^2 + 197721^2 .

It is not a de Polignac number, because 44189840385 - 2¹² = 44189836289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (44189840389) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1599 + ... + 297291.

It is an arithmetic number, because the mean of its divisors is an integer number (1454370939).

Almost surely, 2^44189840385 is an apocalyptic number.

44189840385 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

44189840385 is a deficient number, since it is larger than the sum of its proper divisors (37254932199).

44189840385 is an equidigital number, since it uses as much as digits as its factorization.

44189840385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295757 (or 295742 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 44189840385 in words is "forty-four billion, one hundred eighty-nine million, eight hundred forty thousand, three hundred eighty-five".