1028709 has 12 divisors (see below), whose sum is σ = 1621152. Its totient is φ = 623400.

The previous prime is 1028683. The next prime is 1028737. The reversal of 1028709 is 9078201.

It is not a de Polignac number, because 1028709 - 2⁷ = 1028581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5097 + ... + 5294.

It is an arithmetic number, because the mean of its divisors is an integer number (135096).

2^1028709 is an apocalyptic number.

It is an amenable number.

1028709 is a deficient number, since it is larger than the sum of its proper divisors (592443).

1028709 is a wasteful number, since it uses less digits than its factorization.

1028709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10408 (or 10405 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 1028709 is about 1014.2529270355. The cubic root of 1028709 is about 100.9479521393.

The spelling of 1028709 in words is "one million, twenty-eight thousand, seven hundred nine".