1866916 has 6 divisors (see below), whose sum is σ = 3267110. Its totient is φ = 933456.

The previous prime is 1866901. The next prime is 1866941. The reversal of 1866916 is 6196681.

It can be written as a sum of positive squares in only one way, i.e., 1612900 + 254016 = 1270^2 + 504^2 .

It is an unprimeable number.

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, 233361 + ... + 233368.

2^1866916 is an apocalyptic number.

It is an amenable number.

1866916 is a deficient number, since it is larger than the sum of its proper divisors (1400194).

1866916 is a wasteful number, since it uses less digits than its factorization.

1866916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466733 (or 466731 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 1866916 is about 1366.3513457380. The cubic root of 1866916 is about 123.1331318978.

The spelling of 1866916 in words is "one million, eight hundred sixty-six thousand, nine hundred sixteen".