728745867 has 12 divisors (see below), whose sum is σ = 1052870520. Its totient is φ = 485720928.

The previous prime is 728745841. The next prime is 728745877. The reversal of 728745867 is 768547827.

It is a happy number.

It is not a de Polignac number, because 728745867 - 2¹¹ = 728743819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728745877) 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 11 ways as a sum of consecutive naturals, for example, 62559 + ... + 73287.

It is an arithmetic number, because the mean of its divisors is an integer number (87739210).

Almost surely, 2^728745867 is an apocalyptic number.

728745867 is a deficient number, since it is larger than the sum of its proper divisors (324124653).

728745867 is a wasteful number, since it uses less digits than its factorization.

728745867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18282 (or 18279 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 54.

The square root of 728745867 is about 26995.2934231136. The cubic root of 728745867 is about 899.8954063636.

The spelling of 728745867 in words is "seven hundred twenty-eight million, seven hundred forty-five thousand, eight hundred sixty-seven".