728009049 has 16 divisors (see below), whose sum is σ = 995544000. Its totient is φ = 472958976.

The previous prime is 728009039. The next prime is 728009099. The reversal of 728009049 is 940900827.

It is not a de Polignac number, because 728009049 - 2⁴ = 728009033 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 728008998 and 728009016.

It is not an unprimeable number, because it can be changed into a prime (728009039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51637 + ... + 64205.

It is an arithmetic number, because the mean of its divisors is an integer number (62221500).

Almost surely, 2^728009049 is an apocalyptic number.

It is an amenable number.

728009049 is a deficient number, since it is larger than the sum of its proper divisors (267534951).

728009049 is a wasteful number, since it uses less digits than its factorization.

728009049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13064.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 728009049 is about 26981.6428150697. The cubic root of 728009049 is about 899.5920163173.

The spelling of 728009049 in words is "seven hundred twenty-eight million, nine thousand, forty-nine".