1886668 has 24 divisors (see below), whose sum is σ = 3863552. Its totient is φ = 789264.

The previous prime is 1886663. The next prime is 1886671. The reversal of 1886668 is 8666881.

It is a happy number.

It is a super-2 number, since 2×1886668² = 7119032284448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (1886663) 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, 421 + ... + 1987.

2^1886668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1886668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1931776).

1886668 is an abundant number, since it is smaller than the sum of its proper divisors (1976884).

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

1886668 is a wasteful number, since it uses less digits than its factorization.

1886668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621 (or 1619 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The square root of 1886668 is about 1373.5603372259. The cubic root of 1886668 is about 123.5658595219.

The spelling of 1886668 in words is "one million, eight hundred eighty-six thousand, six hundred sixty-eight".