1809224 has 16 divisors (see below), whose sum is σ = 3418800. Its totient is φ = 897552.

The previous prime is 1809221. The next prime is 1809229. The reversal of 1809224 is 4229081.

It is a junction number, because it is equal to n+sod(n) for n = 1809193 and 1809202.

It is not an unprimeable number, because it can be changed into a prime (1809221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299 + ... + 1925.

It is an arithmetic number, because the mean of its divisors is an integer number (213675).

2^1809224 is an apocalyptic number.

It is an amenable number.

1809224 is a deficient number, since it is larger than the sum of its proper divisors (1609576).

1809224 is a wasteful number, since it uses less digits than its factorization.

1809224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772 (or 1768 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1809224 is about 1345.0739756608. The cubic root of 1809224 is about 121.8514720306.

The spelling of 1809224 in words is "one million, eight hundred nine thousand, two hundred twenty-four".