1828009 has 4 divisors (see below), whose sum is σ = 1924240. Its totient is φ = 1731780.

The previous prime is 1828003. The next prime is 1828019. The reversal of 1828009 is 9008281.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1828009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1828003) 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, 48087 + ... + 48124.

It is an arithmetic number, because the mean of its divisors is an integer number (481060).

2^1828009 is an apocalyptic number.

1828009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1828009 is a deficient number, since it is larger than the sum of its proper divisors (96231).

1828009 is an equidigital number, since it uses as much as digits as its factorization.

1828009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96230.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1828009 is about 1352.0388308033. The cubic root of 1828009 is about 122.2717448840.

The spelling of 1828009 in words is "one million, eight hundred twenty-eight thousand, nine".