1819836 has 18 divisors (see below), whose sum is σ = 4600232. Its totient is φ = 606600.

The previous prime is 1819819. The next prime is 1819841. The reversal of 1819836 is 6389181.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 50551 = 1819836 / (1 + 8 + 1 + 9 + 8 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 1819836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25240 + ... + 25311.

2^1819836 is an apocalyptic number.

It is an amenable number.

1819836 is an abundant number, since it is smaller than the sum of its proper divisors (2780396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1819836 is a wasteful number, since it uses less digits than its factorization.

1819836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50561 (or 50556 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1819836 is about 1349.0129725099. The cubic root of 1819836 is about 122.0892476048.

The spelling of 1819836 in words is "one million, eight hundred nineteen thousand, eight hundred thirty-six".