2004406040 has 64 divisors (see below), whose sum is σ = 5550672960. Its totient is φ = 634360320.

The previous prime is 2004406031. The next prime is 2004406043. The reversal of 2004406040 is 406044002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2004406043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271691 + ... + 278970.

It is an arithmetic number, because the mean of its divisors is an integer number (86729265).

Almost surely, 2^2004406040 is an apocalyptic number.

2004406040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2004406040 is an abundant number, since it is smaller than the sum of its proper divisors (3546266920).

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

2004406040 is a wasteful number, since it uses less digits than its factorization.

2004406040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550692 (or 550688 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2004406040 is about 44770.5934738417. The cubic root of 2004406040 is about 1260.8455817300.

The spelling of 2004406040 in words is "two billion, four million, four hundred six thousand, forty".