728042 has 48 divisors (see below), whose sum is σ = 1477440. Its totient is φ = 266112.

The previous prime is 728027. The next prime is 728047. The reversal of 728042 is 240827.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 727999 and 728017.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 728042.

It is not an unprimeable number, because it can be changed into a prime (728047) 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, 31643 + ... + 31665.

It is an arithmetic number, because the mean of its divisors is an integer number (30780).

2⁷²⁸⁰⁴² is an apocalyptic number.

728042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728042 is a wasteful number, since it uses less digits than its factorization.

728042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 728042 is about 853.2537723327. The cubic root of 728042 is about 89.9605588497.

Adding to 728042 its reverse (240827), we get a palindrome (968869).

The spelling of 728042 in words is "seven hundred twenty-eight thousand, forty-two".