1806369 has 8 divisors (see below), whose sum is σ = 2550240. Its totient is φ = 1133376.

The previous prime is 1806361. The next prime is 1806373. The reversal of 1806369 is 9636081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1806369 - 2³ = 1806361 is a prime.

It is a super-2 number, since 2×1806369² = 6525937928322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1806361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17659 + ... + 17760.

It is an arithmetic number, because the mean of its divisors is an integer number (318780).

2^1806369 is an apocalyptic number.

It is an amenable number.

1806369 is a deficient number, since it is larger than the sum of its proper divisors (743871).

1806369 is a wasteful number, since it uses less digits than its factorization.

1806369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35439.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1806369 is about 1344.0122767296. The cubic root of 1806369 is about 121.7873434127.

Subtracting from 1806369 its sum of digits (33), we obtain a square (1806336 = 1344²).

The spelling of 1806369 in words is "one million, eight hundred six thousand, three hundred sixty-nine".