1828809 has 12 divisors (see below), whose sum is σ = 2797236. Its totient is φ = 1147392.

The previous prime is 1828793. The next prime is 1828829. The reversal of 1828809 is 9088281.

It can be written as a sum of positive squares in 2 ways, for example, as 1550025 + 278784 = 1245^2 + 528^2 .

It is not a de Polignac number, because 1828809 - 2⁴ = 1828793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1828829) 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, 5824 + ... + 6129.

It is an arithmetic number, because the mean of its divisors is an integer number (233103).

2^1828809 is an apocalyptic number.

It is an amenable number.

1828809 is a deficient number, since it is larger than the sum of its proper divisors (968427).

1828809 is a wasteful number, since it uses less digits than its factorization.

1828809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11976 (or 11973 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1828809 is about 1352.3346479330. The cubic root of 1828809 is about 122.2895790650.

The spelling of 1828809 in words is "one million, eight hundred twenty-eight thousand, eight hundred nine".