728866347 has 16 divisors (see below), whose sum is σ = 1122532992. Its totient is φ = 415752320.

The previous prime is 728866337. The next prime is 728866351. The reversal of 728866347 is 743668827.

It is a cyclic number.

It is not a de Polignac number, because 728866347 - 2⁴ = 728866331 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 728866347.

It is not an unprimeable number, because it can be changed into a prime (728866337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649053 + ... + 650174.

It is an arithmetic number, because the mean of its divisors is an integer number (70158312).

Almost surely, 2^728866347 is an apocalyptic number.

728866347 is a deficient number, since it is larger than the sum of its proper divisors (393666645).

728866347 is a wasteful number, since it uses less digits than its factorization.

728866347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299258.

The product of its digits is 2709504, while the sum is 51.

The square root of 728866347 is about 26997.5248309915. The cubic root of 728866347 is about 899.9449954038.

The spelling of 728866347 in words is "seven hundred twenty-eight million, eight hundred sixty-six thousand, three hundred forty-seven".