728907 has 8 divisors (see below), whose sum is σ = 977040. Its totient is φ = 483360.

The previous prime is 728899. The next prime is 728911. The reversal of 728907 is 709827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 728907 - 2³ = 728899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157 + ... + 1217.

It is an arithmetic number, because the mean of its divisors is an integer number (122130).

2⁷²⁸⁹⁰⁷ is an apocalyptic number.

728907 is a deficient number, since it is larger than the sum of its proper divisors (248133).

728907 is a wasteful number, since it uses less digits than its factorization.

728907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 728907 is about 853.7605050598. The cubic root of 728907 is about 89.9961726767.

The spelling of 728907 in words is "seven hundred twenty-eight thousand, nine hundred seven".