1866136 has 8 divisors (see below), whose sum is σ = 3499020. Its totient is φ = 933064.

The previous prime is 1866131. The next prime is 1866143. The reversal of 1866136 is 6316681.

It is a tau number, because it is divible by the number of its divisors (8).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1866098 and 1866107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116626 + ... + 116641.

2^1866136 is an apocalyptic number.

It is an amenable number.

1866136 is a deficient number, since it is larger than the sum of its proper divisors (1632884).

1866136 is a wasteful number, since it uses less digits than its factorization.

1866136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233273 (or 233269 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 1866136 is about 1366.0658842091. The cubic root of 1866136 is about 123.1159811134.

It can be divided in two parts, 1866 and 136, that added together give a palindrome (2002).

The spelling of 1866136 in words is "one million, eight hundred sixty-six thousand, one hundred thirty-six".