1801894 has 16 divisors (see below), whose sum is σ = 2799360. Its totient is φ = 869440.

The previous prime is 1801873. The next prime is 1801897. The reversal of 1801894 is 4981081.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9339 + ... + 9529.

It is an arithmetic number, because the mean of its divisors is an integer number (174960).

2^1801894 is an apocalyptic number.

1801894 is a deficient number, since it is larger than the sum of its proper divisors (997466).

1801894 is a wasteful number, since it uses less digits than its factorization.

1801894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1801894 is about 1342.3464530441. The cubic root of 1801894 is about 121.6866904763.

The spelling of 1801894 in words is "one million, eight hundred one thousand, eight hundred ninety-four".