728651 has 8 divisors (see below), whose sum is σ = 908544. Its totient is φ = 567720.

The previous prime is 728647. The next prime is 728659. The reversal of 728651 is 156827.

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

It is a cyclic number.

It is not a de Polignac number, because 728651 - 2² = 728647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4655 + ... + 4808.

It is an arithmetic number, because the mean of its divisors is an integer number (113568).

2⁷²⁸⁶⁵¹ is an apocalyptic number.

728651 is a deficient number, since it is larger than the sum of its proper divisors (179893).

728651 is a wasteful number, since it uses less digits than its factorization.

728651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9481.

The product of its digits is 3360, while the sum is 29.

The square root of 728651 is about 853.6105669449. The cubic root of 728651 is about 89.9856355676.

It can be divided in two parts, 7286 and 51, that added together give a palindrome (7337).

The spelling of 728651 in words is "seven hundred twenty-eight thousand, six hundred fifty-one".