1812736 has 36 divisors (see below), whose sum is σ = 3705772. Its totient is φ = 884736.

The previous prime is 1812721. The next prime is 1812749. The reversal of 1812736 is 6372181.

It can be written as a sum of positive squares in 2 ways, for example, as 921600 + 891136 = 960^2 + 944^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18640 + ... + 18736.

2^1812736 is an apocalyptic number.

1812736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1812736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1852886).

1812736 is an abundant number, since it is smaller than the sum of its proper divisors (1893036).

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

1812736 is an frugal number, since it uses more digits than its factorization.

1812736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 172 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 1812736 is about 1346.3788471303. The cubic root of 1812736 is about 121.9302656213.

The spelling of 1812736 in words is "one million, eight hundred twelve thousand, seven hundred thirty-six".