1801668 has 24 divisors (see below), whose sum is σ = 4586400. Its totient is φ = 545920.

The previous prime is 1801619. The next prime is 1801669. The reversal of 1801668 is 8661081.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1801669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6693 + ... + 6956.

It is an arithmetic number, because the mean of its divisors is an integer number (191100).

2^1801668 is an apocalyptic number.

It is an amenable number.

1801668 is an abundant number, since it is smaller than the sum of its proper divisors (2784732).

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

1801668 is a wasteful number, since it uses less digits than its factorization.

1801668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13667 (or 13665 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1801668 is about 1342.2622694541. The cubic root of 1801668 is about 121.6816028034.

The spelling of 1801668 in words is "one million, eight hundred one thousand, six hundred sixty-eight".