1801868 has 12 divisors (see below), whose sum is σ = 3230472. Its totient is φ = 878880.

The previous prime is 1801867. The next prime is 1801871. The reversal of 1801868 is 8681081.

It is a happy number.

It is a hoax number, since the sum of its digits (32) 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 (1801867) 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 3 ways as a sum of consecutive naturals, for example, 5330 + ... + 5657.

It is an arithmetic number, because the mean of its divisors is an integer number (269206).

2^1801868 is an apocalyptic number.

It is an amenable number.

1801868 is a deficient number, since it is larger than the sum of its proper divisors (1428604).

1801868 is a wasteful number, since it uses less digits than its factorization.

1801868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11032 (or 11030 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 1801868 is about 1342.3367684750. The cubic root of 1801868 is about 121.6861051905.

It can be divided in two parts, 180 and 1868, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1801868 in words is "one million, eight hundred one thousand, eight hundred sixty-eight".