728541 has 24 divisors (see below), whose sum is σ = 1191680. Its totient is φ = 439560.

The previous prime is 728537. The next prime is 728551. The reversal of 728541 is 145827.

It is not a de Polignac number, because 728541 - 2² = 728537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3156 + ... + 3378.

2⁷²⁸⁵⁴¹ is an apocalyptic number.

It is an amenable number.

728541 is a deficient number, since it is larger than the sum of its proper divisors (463139).

728541 is a wasteful number, since it uses less digits than its factorization.

728541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 237 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 728541 is about 853.5461323209. The cubic root of 728541 is about 89.9811071454.

The spelling of 728541 in words is "seven hundred twenty-eight thousand, five hundred forty-one".