1128309 has 16 divisors (see below), whose sum is σ = 1852032. Its totient is φ = 595008.

The previous prime is 1128301. The next prime is 1128313. The reversal of 1128309 is 9038211.

It is not a de Polignac number, because 1128309 - 2³ = 1128301 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1794 + ... + 2339.

It is an arithmetic number, because the mean of its divisors is an integer number (115752).

2^1128309 is an apocalyptic number.

It is an amenable number.

1128309 is a deficient number, since it is larger than the sum of its proper divisors (723723).

1128309 is a wasteful number, since it uses less digits than its factorization.

1128309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4156.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1128309 is about 1062.2189039930. The cubic root of 1128309 is about 104.1060616708.

The spelling of 1128309 in words is "one million, one hundred twenty-eight thousand, three hundred nine".