728834671 has 4 divisors (see below), whose sum is σ = 731134152. Its totient is φ = 726535192.

The previous prime is 728834647. The next prime is 728834677. The reversal of 728834671 is 176438827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 728834671 - 2²¹ = 726737519 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 (728834677) 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, 1149265 + ... + 1149898.

It is an arithmetic number, because the mean of its divisors is an integer number (182783538).

Almost surely, 2^728834671 is an apocalyptic number.

728834671 is a deficient number, since it is larger than the sum of its proper divisors (2299481).

728834671 is a wasteful number, since it uses less digits than its factorization.

728834671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2299480.

The product of its digits is 451584, while the sum is 46.

The square root of 728834671 is about 26996.9381782453. The cubic root of 728834671 is about 899.9319582305.

The spelling of 728834671 in words is "seven hundred twenty-eight million, eight hundred thirty-four thousand, six hundred seventy-one".