2001040404 has 72 divisors (see below), whose sum is σ = 5402332320. Its totient is φ = 574453440.

The previous prime is 2001040367. The next prime is 2001040417. The reversal of 2001040404 is 4040401002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8679 + ... + 63854.

Almost surely, 2^2001040404 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 2001040404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2701166160).

2001040404 is an abundant number, since it is smaller than the sum of its proper divisors (3401291916).

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

2001040404 is a wasteful number, since it uses less digits than its factorization.

2001040404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72581 (or 72568 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2001040404 is about 44732.9901079729. The cubic root of 2001040404 is about 1260.1394831728.

Adding to 2001040404 its reverse (4040401002), we get a palindrome (6041441406).

The spelling of 2001040404 in words is "two billion, one million, forty thousand, four hundred four".