2640442235 has 4 divisors (see below), whose sum is σ = 3168530688. Its totient is φ = 2112353784.

The previous prime is 2640442229. The next prime is 2640442247. The reversal of 2640442235 is 5322440462.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2640442235 - 2²⁴ = 2623665019 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264044219 + ... + 264044228.

It is an arithmetic number, because the mean of its divisors is an integer number (792132672).

Almost surely, 2^2640442235 is an apocalyptic number.

2640442235 is a deficient number, since it is larger than the sum of its proper divisors (528088453).

2640442235 is an equidigital number, since it uses as much as digits as its factorization.

2640442235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528088452.

The product of its (nonzero) digits is 46080, while the sum is 32.

The square root of 2640442235 is about 51385.2336279597. The cubic root of 2640442235 is about 1382.1618141939.

Adding to 2640442235 its reverse (5322440462), we get a palindrome (7962882697).

The spelling of 2640442235 in words is "two billion, six hundred forty million, four hundred forty-two thousand, two hundred thirty-five".