1901804 has 12 divisors (see below), whose sum is σ = 3405864. Its totient is φ = 928704.

The previous prime is 1901803. The next prime is 1901831. The reversal of 1901804 is 4081091.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1901804.

It is not an unprimeable number, because it can be changed into a prime (1901803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5357 + ... + 5700.

It is an arithmetic number, because the mean of its divisors is an integer number (283822).

2^1901804 is an apocalyptic number.

It is an amenable number.

1901804 is a deficient number, since it is larger than the sum of its proper divisors (1504060).

1901804 is a wasteful number, since it uses less digits than its factorization.

1901804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11104 (or 11102 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1901804 is about 1379.0590995313. The cubic root of 1901804 is about 123.8954199746.

Adding to 1901804 its reverse (4081091), we get a palindrome (5982895).

The spelling of 1901804 in words is "one million, nine hundred one thousand, eight hundred four".