728260667 has 4 divisors (see below), whose sum is σ = 728335080. Its totient is φ = 728186256.

The previous prime is 728260657. The next prime is 728260693. The reversal of 728260667 is 766062827.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 728260667 - 2⁸ = 728260411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728260657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19817 + ... + 43002.

It is an arithmetic number, because the mean of its divisors is an integer number (182083770).

Almost surely, 2^728260667 is an apocalyptic number.

728260667 is a deficient number, since it is larger than the sum of its proper divisors (74413).

728260667 is a wasteful number, since it uses less digits than its factorization.

728260667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74412.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 728260667 is about 26986.3051750328. The cubic root of 728260667 is about 899.6956448237.

The spelling of 728260667 in words is "seven hundred twenty-eight million, two hundred sixty thousand, six hundred sixty-seven".