1868866 has 16 divisors (see below), whose sum is σ = 2965248. Its totient is φ = 882000.

The previous prime is 1868863. The next prime is 1868879. The reversal of 1868866 is 6688681.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (1868863) by changing a digit.

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, 2316 + ... + 3016.

It is an arithmetic number, because the mean of its divisors is an integer number (185328).

2^1868866 is an apocalyptic number.

1868866 is a deficient number, since it is larger than the sum of its proper divisors (1096382).

1868866 is a wasteful number, since it uses less digits than its factorization.

1868866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777.

The product of its digits is 110592, while the sum is 43.

The square root of 1868866 is about 1367.0647387743. The cubic root of 1868866 is about 123.1759879694.

The spelling of 1868866 in words is "one million, eight hundred sixty-eight thousand, eight hundred sixty-six".