2043904 has 26 divisors (see below), whose sum is σ = 4095500. Its totient is φ = 1019904.

The previous prime is 2043869. The next prime is 2043907. The reversal of 2043904 is 4093402.

It is a super-2 number, since 2×2043904² = 8355087122432, which contains 22 as substring.

It is a nialpdrome in base 8.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (2043907) by changing a digit.

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, 3847 + ... + 4345.

2^2043904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2043904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2047750).

2043904 is an abundant number, since it is smaller than the sum of its proper divisors (2051596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2043904 is an frugal number, since it uses more digits than its factorization.

2043904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 2043904 is about 1429.6517058361. The cubic root of 2043904 is about 126.9073662643.

The spelling of 2043904 in words is "two million, forty-three thousand, nine hundred four".