728142641 has 6 divisors (see below), whose sum is σ = 732405990. Its totient is φ = 723903968.

The previous prime is 728142637. The next prime is 728142677. The reversal of 728142641 is 146241827.

728142641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 541027600 + 187115041 = 23260^2 + 13679^2 .

It is not a de Polignac number, because 728142641 - 2² = 728142637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728142341) 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, 17765 + ... + 42093.

It is an arithmetic number, because the mean of its divisors is an integer number (122067665).

Almost surely, 2^728142641 is an apocalyptic number.

It is an amenable number.

728142641 is a deficient number, since it is larger than the sum of its proper divisors (4263349).

728142641 is an equidigital number, since it uses as much as digits as its factorization.

728142641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24675 (or 24502 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 728142641 is about 26984.1183105915. The cubic root of 728142641 is about 899.6470389605.

The spelling of 728142641 in words is "seven hundred twenty-eight million, one hundred forty-two thousand, six hundred forty-one".