1868544 has 54 divisors (see below), whose sum is σ = 5394116. Its totient is φ = 622080.

The previous prime is 1868533. The next prime is 1868549. The reversal of 1868544 is 4458681.

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

It is a junction number, because it is equal to n+sod(n) for n = 1868499 and 1868508.

It is not an unprimeable number, because it can be changed into a prime (1868549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1899 + ... + 2709.

2^1868544 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 1868544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2697058).

1868544 is an abundant number, since it is smaller than the sum of its proper divisors (3525572).

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

1868544 is an equidigital number, since it uses as much as digits as its factorization.

1868544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 816 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 1868544 is about 1366.9469631262. The cubic root of 1868544 is about 123.1689132788.

The spelling of 1868544 in words is "one million, eight hundred sixty-eight thousand, five hundred forty-four".