44531993 has 12 divisors (see below), whose sum is σ = 51830100. Its totient is φ = 38100480.

The previous prime is 44531989. The next prime is 44531999. The reversal of 44531993 is 39913544.

44531993 = 392² + 393² + ... + 578².

It can be written as a sum of positive squares in 2 ways, for example, as 25938649 + 18593344 = 5093^2 + 4312^2 .

It is not a de Polignac number, because 44531993 - 2² = 44531989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44531999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8768 + ... + 12881.

It is an arithmetic number, because the mean of its divisors is an integer number (4319175).

Almost surely, 2^44531993 is an apocalyptic number.

It is an amenable number.

44531993 is a deficient number, since it is larger than the sum of its proper divisors (7298107).

44531993 is a wasteful number, since it uses less digits than its factorization.

44531993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21688 (or 21677 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 44531993 is about 6673.2295779480. The cubic root of 44531993 is about 354.4519560658.

It can be divided in two parts, 4453 and 1993, that added together give a palindrome (6446).

The spelling of 44531993 in words is "forty-four million, five hundred thirty-one thousand, nine hundred ninety-three".