1866844 has 24 divisors (see below), whose sum is σ = 3798368. Its totient is φ = 786240.

The previous prime is 1866833. The next prime is 1866847. The reversal of 1866844 is 4486681.

1866844 is nontrivially palindromic in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1162 + ... + 2254.

2^1866844 is an apocalyptic number.

1866844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1866844 is an abundant number, since it is smaller than the sum of its proper divisors (1931524).

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

1866844 is a wasteful number, since it uses less digits than its factorization.

1866844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165 (or 1163 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 1866844 is about 1366.3249979416. The cubic root of 1866844 is about 123.1315489486.

The spelling of 1866844 in words is "one million, eight hundred sixty-six thousand, eight hundred forty-four".