728388079 has 4 divisors (see below), whose sum is σ = 729982384. Its totient is φ = 726793776.

The previous prime is 728388049. The next prime is 728388091. The reversal of 728388079 is 970883827.

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

It is a cyclic number.

It is not a de Polignac number, because 728388079 - 2²⁵ = 694833647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728388049) 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, 796467 + ... + 797380.

It is an arithmetic number, because the mean of its divisors is an integer number (182495596).

Almost surely, 2^728388079 is an apocalyptic number.

728388079 is a deficient number, since it is larger than the sum of its proper divisors (1594305).

728388079 is a wasteful number, since it uses less digits than its factorization.

728388079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594304.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The square root of 728388079 is about 26988.6657506443. The cubic root of 728388079 is about 899.7481101667.

The spelling of 728388079 in words is "seven hundred twenty-eight million, three hundred eighty-eight thousand, seventy-nine".