728475 has 24 divisors (see below), whose sum is σ = 1315392. Its totient is φ = 352800.

The previous prime is 728471. The next prime is 728477. The reversal of 728475 is 574827.

It is not a de Polignac number, because 728475 - 2² = 728471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (728471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384 + ... + 1266.

It is an arithmetic number, because the mean of its divisors is an integer number (54808).

2⁷²⁸⁴⁷⁵ is an apocalyptic number.

728475 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

728475 is a deficient number, since it is larger than the sum of its proper divisors (586917).

728475 is a wasteful number, since it uses less digits than its factorization.

728475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 902 counting only the distinct ones).

The product of its digits is 15680, while the sum is 33.

The square root of 728475 is about 853.5074692116. The cubic root of 728475 is about 89.9783898733.

It can be divided in two parts, 7 and 28475, that added together give a palindrome (28482).

The spelling of 728475 in words is "seven hundred twenty-eight thousand, four hundred seventy-five".