1028613 has 4 divisors (see below), whose sum is σ = 1371488. Its totient is φ = 685740.

The previous prime is 1028597. The next prime is 1028617. The reversal of 1028613 is 3168201.

1028613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1028613 - 2⁴ = 1028597 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1028613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171433 + ... + 171438.

It is an arithmetic number, because the mean of its divisors is an integer number (342872).

2^1028613 is an apocalyptic number.

It is an amenable number.

1028613 is a deficient number, since it is larger than the sum of its proper divisors (342875).

1028613 is an equidigital number, since it uses as much as digits as its factorization.

1028613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342874.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1028613 is about 1014.2056004578. The cubic root of 1028613 is about 100.9448118587.

The spelling of 1028613 in words is "one million, twenty-eight thousand, six hundred thirteen".