1028493 has 6 divisors (see below), whose sum is σ = 1485614. Its totient is φ = 685656.

The previous prime is 1028479. The next prime is 1028509. The reversal of 1028493 is 3948201.

It can be written as a sum of positive squares in only one way, i.e., 927369 + 101124 = 963^2 + 318^2 .

It is not a de Polignac number, because 1028493 - 2¹³ = 1020301 is a prime.

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 (1028473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57130 + ... + 57147.

2^1028493 is an apocalyptic number.

It is an amenable number.

1028493 is a deficient number, since it is larger than the sum of its proper divisors (457121).

1028493 is a wasteful number, since it uses less digits than its factorization.

1028493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114283 (or 114280 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1028493 is about 1014.1464391300. The cubic root of 1028493 is about 100.9408862331.

It can be divided in two parts, 1028 and 493, that added together give a square (1521 = 39²).

The spelling of 1028493 in words is "one million, twenty-eight thousand, four hundred ninety-three".