2065436440 has 16 divisors (see below), whose sum is σ = 4647232080. Its totient is φ = 826174560.

The previous prime is 2065436389. The next prime is 2065436441. The reversal of 2065436440 is 446345602.

It is a junction number, because it is equal to n+sod(n) for n = 2065436396 and 2065436405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2065436441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25817916 + ... + 25817995.

It is an arithmetic number, because the mean of its divisors is an integer number (290452005).

Almost surely, 2^2065436440 is an apocalyptic number.

2065436440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2065436440 is an abundant number, since it is smaller than the sum of its proper divisors (2581795640).

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

2065436440 is a wasteful number, since it uses less digits than its factorization.

2065436440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51635922 (or 51635918 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

The square root of 2065436440 is about 45447.0729530517. The cubic root of 2065436440 is about 1273.5146490949.

The spelling of 2065436440 in words is "two billion, sixty-five million, four hundred thirty-six thousand, four hundred forty".