1828409 has 4 divisors (see below), whose sum is σ = 1994640. Its totient is φ = 1662180.

The previous prime is 1828399. The next prime is 1828423. The reversal of 1828409 is 9048281.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9048281 = 11 ⋅822571.

It is a cyclic number.

It is not a de Polignac number, because 1828409 - 2⁸ = 1828153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1828439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83099 + ... + 83120.

It is an arithmetic number, because the mean of its divisors is an integer number (498660).

2^1828409 is an apocalyptic number.

It is an amenable number.

1828409 is a deficient number, since it is larger than the sum of its proper divisors (166231).

1828409 is a wasteful number, since it uses less digits than its factorization.

1828409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166230.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1828409 is about 1352.1867474576. The cubic root of 1828409 is about 122.2806626247.

The spelling of 1828409 in words is "one million, eight hundred twenty-eight thousand, four hundred nine".