728119489 has 4 divisors (see below), whose sum is σ = 728784324. Its totient is φ = 727454656.

The previous prime is 728119481. The next prime is 728119493. The reversal of 728119489 is 984911827.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114318864 + 613800625 = 10692^2 + 24775^2 .

It is a cyclic number.

It is not a de Polignac number, because 728119489 - 2³ = 728119481 is a prime.

It is a super-2 number, since 2×728119489² = 1060315980523242242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728119481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330772 + ... + 332965.

It is an arithmetic number, because the mean of its divisors is an integer number (182196081).

Almost surely, 2^728119489 is an apocalyptic number.

It is an amenable number.

728119489 is a deficient number, since it is larger than the sum of its proper divisors (664835).

728119489 is a wasteful number, since it uses less digits than its factorization.

728119489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664834.

The product of its digits is 290304, while the sum is 49.

The square root of 728119489 is about 26983.6893141023. The cubic root of 728119489 is about 899.6375038100.

The spelling of 728119489 in words is "seven hundred twenty-eight million, one hundred nineteen thousand, four hundred eighty-nine".