1866612 has 48 divisors (see below), whose sum is σ = 4838400. Its totient is φ = 555360.

The previous prime is 1866593. The next prime is 1866637. The reversal of 1866612 is 2166681.

It is a self number, because there is not a number n which added to its sum of digits gives 1866612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10339 + ... + 10517.

It is an arithmetic number, because the mean of its divisors is an integer number (100800).

2^1866612 is an apocalyptic number.

1866612 is a gapful number since it is divisible by the number (12) 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 1866612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2419200).

1866612 is an abundant number, since it is smaller than the sum of its proper divisors (2971788).

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

1866612 is a wasteful number, since it uses less digits than its factorization.

1866612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 274 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 1866612 is about 1366.2400960300. The cubic root of 1866612 is about 123.1264480577.

The spelling of 1866612 in words is "one million, eight hundred sixty-six thousand, six hundred twelve".