2044538391 has 8 divisors (see below), whose sum is σ = 3115487104. Its totient is φ = 1168307640.

The previous prime is 2044538389. The next prime is 2044538411. The reversal of 2044538391 is 1938354402.

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

It is not a de Polignac number, because 2044538391 - 2¹ = 2044538389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2044538191) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 48679465 + ... + 48679506.

It is an arithmetic number, because the mean of its divisors is an integer number (389435888).

Almost surely, 2^2044538391 is an apocalyptic number.

2044538391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2044538391 is a deficient number, since it is larger than the sum of its proper divisors (1070948713).

2044538391 is an equidigital number, since it uses as much as digits as its factorization.

2044538391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97358981.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 2044538391 is about 45216.5720836952. The cubic root of 2044538391 is about 1269.2049482658.

The spelling of 2044538391 in words is "two billion, forty-four million, five hundred thirty-eight thousand, three hundred ninety-one".