744721198728 has 192 divisors, whose sum is σ = 2052774420480. Its totient is φ = 224995680000.

The previous prime is 744721198723. The next prime is 744721198733. The reversal of 744721198728 is 827891127447.

It is an interprime number because it is at equal distance from previous prime (744721198723) and next prime (744721198733).

It is not an unprimeable number, because it can be changed into a prime (744721198723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72276825 + ... + 72287127.

It is an arithmetic number, because the mean of its divisors is an integer number (10691533440).

Almost surely, 2^744721198728 is an apocalyptic number.

744721198728 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 744721198728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1026387210240).

744721198728 is an abundant number, since it is smaller than the sum of its proper divisors (1308053221752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

744721198728 is a wasteful number, since it uses less digits than its factorization.

744721198728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10660 (or 10643 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 60.

The spelling of 744721198728 in words is "seven hundred forty-four billion, seven hundred twenty-one million, one hundred ninety-eight thousand, seven hundred twenty-eight".