1803668 has 6 divisors (see below), whose sum is σ = 3156426. Its totient is φ = 901832.

The previous prime is 1803667. The next prime is 1803671. The reversal of 1803668 is 8663081.

It can be written as a sum of positive squares in only one way, i.e., 1800964 + 2704 = 1342^2 + 52^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225455 + ... + 225462.

It is an arithmetic number, because the mean of its divisors is an integer number (526071).

2^1803668 is an apocalyptic number.

It is an amenable number.

1803668 is a deficient number, since it is larger than the sum of its proper divisors (1352758).

1803668 is a wasteful number, since it uses less digits than its factorization.

1803668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450921 (or 450919 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1803668 is about 1343.0070736969. The cubic root of 1803668 is about 121.7266116896.

The spelling of 1803668 in words is "one million, eight hundred three thousand, six hundred sixty-eight".