1866408 has 32 divisors (see below), whose sum is σ = 4912800. Its totient is φ = 589248.

The previous prime is 1866373. The next prime is 1866409. The reversal of 1866408 is 8046681.

It is not an unprimeable number, because it can be changed into a prime (1866409) 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 7 ways as a sum of consecutive naturals, for example, 1591 + ... + 2502.

It is an arithmetic number, because the mean of its divisors is an integer number (153525).

2^1866408 is an apocalyptic number.

It is an amenable number.

1866408 is an abundant number, since it is smaller than the sum of its proper divisors (3046392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1866408 is a wasteful number, since it uses less digits than its factorization.

1866408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4121 (or 4117 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1866408 is about 1366.1654365413. The cubic root of 1866408 is about 123.1219624423.

The spelling of 1866408 in words is "one million, eight hundred sixty-six thousand, four hundred eight".