1866946 has 8 divisors (see below), whose sum is σ = 2876220. Its totient is φ = 908208.

The previous prime is 1866941. The next prime is 1866961. The reversal of 1866946 is 6496681.

It can be written as a sum of positive squares in 2 ways, for example, as 1863225 + 3721 = 1365^2 + 61^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1866899 and 1866908.

It is not an unprimeable number, because it can be changed into a prime (1866941) 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 in 3 ways as a sum of consecutive naturals, for example, 12541 + ... + 12688.

2^1866946 is an apocalyptic number.

1866946 is a deficient number, since it is larger than the sum of its proper divisors (1009274).

1866946 is a wasteful number, since it uses less digits than its factorization.

1866946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25268.

The product of its digits is 62208, while the sum is 40.

The square root of 1866946 is about 1366.3623238365. The cubic root of 1866946 is about 123.1337914480.

The spelling of 1866946 in words is "one million, eight hundred sixty-six thousand, nine hundred forty-six".