2640038687 has 8 divisors (see below), whose sum is σ = 3101584080. Its totient is φ = 2215416960.

The previous prime is 2640038659. The next prime is 2640038699. The reversal of 2640038687 is 7868300462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2640038687 - 2⁶ = 2640038623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640031687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9230762 + ... + 9231047.

It is an arithmetic number, because the mean of its divisors is an integer number (387698010).

Almost surely, 2^2640038687 is an apocalyptic number.

2640038687 is a deficient number, since it is larger than the sum of its proper divisors (461545393).

2640038687 is a wasteful number, since it uses less digits than its factorization.

2640038687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18461833.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 2640038687 is about 51381.3067856395. The cubic root of 2640038687 is about 1382.0913970688.

The spelling of 2640038687 in words is "two billion, six hundred forty million, thirty-eight thousand, six hundred eighty-seven".