728667863 has 16 divisors (see below), whose sum is σ = 909206016. Its totient is φ = 567332640.

The previous prime is 728667859. The next prime is 728667883. The reversal of 728667863 is 368766827.

It is not a de Polignac number, because 728667863 - 2² = 728667859 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 (728667883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115745 + ... + 121877.

It is an arithmetic number, because the mean of its divisors is an integer number (56825376).

Almost surely, 2^728667863 is an apocalyptic number.

728667863 is a deficient number, since it is larger than the sum of its proper divisors (180538153).

728667863 is a wasteful number, since it uses less digits than its factorization.

728667863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7694.

The product of its digits is 4064256, while the sum is 53.

The square root of 728667863 is about 26993.8486140824. The cubic root of 728667863 is about 899.8632973440.

The spelling of 728667863 in words is "seven hundred twenty-eight million, six hundred sixty-seven thousand, eight hundred sixty-three".