728269647 has 16 divisors (see below), whose sum is σ = 1175023872. Its totient is φ = 391674240.

The previous prime is 728269621. The next prime is 728269651. The reversal of 728269647 is 746962827.

728269647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 728269647 - 2²² = 724075343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 728269647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728269697) 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, 1019629 + ... + 1020342.

It is an arithmetic number, because the mean of its divisors is an integer number (73438992).

Almost surely, 2^728269647 is an apocalyptic number.

728269647 is a deficient number, since it is larger than the sum of its proper divisors (446754225).

728269647 is a wasteful number, since it uses less digits than its factorization.

728269647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039998.

The product of its digits is 2032128, while the sum is 51.

The square root of 728269647 is about 26986.4715552071. The cubic root of 728269647 is about 899.6993427824.

The spelling of 728269647 in words is "seven hundred twenty-eight million, two hundred sixty-nine thousand, six hundred forty-seven".