728135039 has 4 divisors (see below), whose sum is σ = 745068456. Its totient is φ = 711201624.

The previous prime is 728135011. The next prime is 728135053. The reversal of 728135039 is 930531827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930531827 = 4483 ⋅207569.

It is a cyclic number.

It is not a de Polignac number, because 728135039 - 2⁸ = 728134783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 728134993 and 728135011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728135939) 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, 8466644 + ... + 8466729.

It is an arithmetic number, because the mean of its divisors is an integer number (186267114).

Almost surely, 2^728135039 is an apocalyptic number.

728135039 is a deficient number, since it is larger than the sum of its proper divisors (16933417).

728135039 is a wasteful number, since it uses less digits than its factorization.

728135039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16933416.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 728135039 is about 26983.9774495903. The cubic root of 728135039 is about 899.6439080993.

The spelling of 728135039 in words is "seven hundred twenty-eight million, one hundred thirty-five thousand, thirty-nine".