2065909440 has 448 divisors, whose sum is σ = 7940210688. Its totient is φ = 445132800.

The previous prime is 2065909421. The next prime is 2065909451. The reversal of 2065909440 is 449095602.

It is a tau number, because it is divible by the number of its divisors (448).

It is a super-2 number, since 2×2065909440² = 8535963628562227200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9790935 + ... + 9791145.

Almost surely, 2^2065909440 is an apocalyptic number.

2065909440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2065909440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3970105344).

2065909440 is an abundant number, since it is smaller than the sum of its proper divisors (5874301248).

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

2065909440 is a wasteful number, since it uses less digits than its factorization.

2065909440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 2065909440 is about 45452.2765106436. The cubic root of 2065909440 is about 1273.6118563874.

The spelling of 2065909440 in words is "two billion, sixty-five million, nine hundred nine thousand, four hundred forty".