1816956 has 36 divisors (see below), whose sum is σ = 4708704. Its totient is φ = 590400.

The previous prime is 1816949. The next prime is 1816957. The reversal of 1816956 is 6596181.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1816956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 861 + ... + 2091.

2^1816956 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 1816956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2354352).

1816956 is an abundant number, since it is smaller than the sum of its proper divisors (2891748).

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

1816956 is a wasteful number, since it uses less digits than its factorization.

1816956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282 (or 1277 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1816956 is about 1347.9451027397. The cubic root of 1816956 is about 122.0248090727.

It can be divided in two parts, 18169 and 56, that added together give a square (18225 = 135²).

The spelling of 1816956 in words is "one million, eight hundred sixteen thousand, nine hundred fifty-six".