2040440406 has 32 divisors (see below), whose sum is σ = 4335711840. Its totient is φ = 638942976.

The previous prime is 2040440401. The next prime is 2040440407. The reversal of 2040440406 is 6040440402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040440401) 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, 152031 + ... + 164906.

It is an arithmetic number, because the mean of its divisors is an integer number (135490995).

Almost surely, 2^2040440406 is an apocalyptic number.

2040440406 is an abundant number, since it is smaller than the sum of its proper divisors (2295271434).

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

2040440406 is a wasteful number, since it uses less digits than its factorization.

2040440406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317008.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 2040440406 is about 45171.2342758088. The cubic root of 2040440406 is about 1268.3564011077.

Adding to 2040440406 its reverse (6040440402), we get a palindrome (8080880808).

The spelling of 2040440406 in words is "two billion, forty million, four hundred forty thousand, four hundred six".