1860866 has 16 divisors (see below), whose sum is σ = 3243840. Its totient is φ = 784080.

The previous prime is 1860857. The next prime is 1860869. The reversal of 1860866 is 6680681.

It is a Cunningham number, because it is equal to 123³-1.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (1860869) 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, 236 + ... + 1943.

It is an arithmetic number, because the mean of its divisors is an integer number (202740).

2^1860866 is an apocalyptic number.

1860866 is a deficient number, since it is larger than the sum of its proper divisors (1382974).

1860866 is a wasteful number, since it uses less digits than its factorization.

1860866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1860866 is about 1364.1356237559. The cubic root of 1860866 is about 122.9999779673. Note that the first 4 decimals are identical.

The spelling of 1860866 in words is "one million, eight hundred sixty thousand, eight hundred sixty-six".