744868889 has 6 divisors (see below), whose sum is σ = 791262414. Its totient is φ = 701052800.

The previous prime is 744868879. The next prime is 744868897. The reversal of 744868889 is 988868447.

It can be written as a sum of positive squares in 3 ways, for example, as 234334864 + 510534025 = 15308^2 + 22595^2 .

It is a de Polignac number, because none of the positive numbers 2^k-744868889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (744868819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1288412 + ... + 1288989.

It is an arithmetic number, because the mean of its divisors is an integer number (131877069).

Almost surely, 2^744868889 is an apocalyptic number.

It is an amenable number.

744868889 is a deficient number, since it is larger than the sum of its proper divisors (46393525).

744868889 is a wasteful number, since it uses less digits than its factorization.

744868889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577435 (or 2577418 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 62.

The square root of 744868889 is about 27292.2862545445. The cubic root of 744868889 is about 906.4835871659.

The spelling of 744868889 in words is "seven hundred forty-four million, eight hundred sixty-eight thousand, eight hundred eighty-nine".