1810836 has 60 divisors (see below), whose sum is σ = 4960032. Its totient is φ = 577368.

The previous prime is 1810819. The next prime is 1810867. The reversal of 1810836 is 6380181.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 78721 + ... + 78743.

2^1810836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1810836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2480016).

1810836 is an abundant number, since it is smaller than the sum of its proper divisors (3149196).

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

1810836 is an frugal number, since it uses more digits than its factorization.

1810836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1810836 is about 1345.6730657927. The cubic root of 1810836 is about 121.8876507578.

The spelling of 1810836 in words is "one million, eight hundred ten thousand, eight hundred thirty-six".