1801898 has 32 divisors (see below), whose sum is σ = 3348864. Its totient is φ = 709632.

The previous prime is 1801897. The next prime is 1801901. The reversal of 1801898 is 8981081.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 15890 + ... + 16002.

It is an arithmetic number, because the mean of its divisors is an integer number (104652).

2^1801898 is an apocalyptic number.

1801898 is a deficient number, since it is larger than the sum of its proper divisors (1546966).

1801898 is a wasteful number, since it uses less digits than its factorization.

1801898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206.

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 1801898 is about 1342.3479429716. The cubic root of 1801898 is about 121.6867805198.

The spelling of 1801898 in words is "one million, eight hundred one thousand, eight hundred ninety-eight".