731028 has 12 divisors (see below), whose sum is σ = 1705760. Its totient is φ = 243672.

The previous prime is 730999. The next prime is 731033. The reversal of 731028 is 820137.

731028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 730995 and 731013.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 731028.

It is an unprimeable number.

731028 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30448 + ... + 30471.

2⁷³¹⁰²⁸ is an apocalyptic number.

It is an amenable number.

731028 is an abundant number, since it is smaller than the sum of its proper divisors (974732).

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

731028 is a wasteful number, since it uses less digits than its factorization.

731028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60926 (or 60924 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 731028 is about 855.0017543842. The cubic root of 731028 is about 90.0833795202.

The spelling of 731028 in words is "seven hundred thirty-one thousand, twenty-eight".