2001904 has 10 divisors (see below), whose sum is σ = 3878720. Its totient is φ = 1000944.

The previous prime is 2001847. The next prime is 2001911. The reversal of 2001904 is 4091002.

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: 125119 = 2001904 / (2 + 0 + 0 + 1 + 9 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62544 + ... + 62575.

It is an arithmetic number, because the mean of its divisors is an integer number (387872).

2^2001904 is an apocalyptic number.

It is an amenable number.

2001904 is a deficient number, since it is larger than the sum of its proper divisors (1876816).

2001904 is a wasteful number, since it uses less digits than its factorization.

2001904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125127 (or 125121 counting only the distinct ones).

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

The square root of 2001904 is about 1414.8865678916. The cubic root of 2001904 is about 126.0320738034.

Adding to 2001904 its reverse (4091002), we get a palindrome (6092906).

The spelling of 2001904 in words is "two million, one thousand, nine hundred four".