201904 has 10 divisors (see below), whose sum is σ = 391220. Its totient is φ = 100944.

The previous prime is 201893. The next prime is 201907. The reversal of 201904 is 409102.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 12619 = 201904 / (2 + 0 + 1 + 9 + 0 + 4).

It is not an unprimeable number, because it can be changed into a prime (201907) by changing a digit.

201904 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6294 + ... + 6325.

It is an arithmetic number, because the mean of its divisors is an integer number (39122).

2²⁰¹⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

201904 is a deficient number, since it is larger than the sum of its proper divisors (189316).

201904 is a wasteful number, since it uses less digits than its factorization.

201904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12627 (or 12621 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 201904 is about 449.3372897946. The cubic root of 201904 is about 58.6653466186.

The spelling of 201904 in words is "two hundred one thousand, nine hundred four".