1818656 has 48 divisors (see below), whose sum is σ = 4281984. Its totient is φ = 743424.

The previous prime is 1818647. The next prime is 1818667. The reversal of 1818656 is 6568181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4976 + ... + 5328.

It is an arithmetic number, because the mean of its divisors is an integer number (89208).

2^1818656 is an apocalyptic number.

1818656 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 1818656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2140992).

1818656 is an abundant number, since it is smaller than the sum of its proper divisors (2463328).

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

1818656 is a wasteful number, since it uses less digits than its factorization.

1818656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 385 counting only the distinct ones).

The product of its digits is 11520, while the sum is 35.

The square root of 1818656 is about 1348.5755447879. The cubic root of 1818656 is about 122.0628539332.

The spelling of 1818656 in words is "one million, eight hundred eighteen thousand, six hundred fifty-six".