2638380707 has 4 divisors (see below), whose sum is σ = 2643067560. Its totient is φ = 2633693856.

The previous prime is 2638380691. The next prime is 2638380721. The reversal of 2638380707 is 7070838362.

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 2638380707 - 2⁴ = 2638380691 is a prime.

It is a super-2 number, since 2×2638380707² = 13922105510139639698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2638380307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342582 + ... + 2343707.

It is an arithmetic number, because the mean of its divisors is an integer number (660766890).

Almost surely, 2^2638380707 is an apocalyptic number.

2638380707 is a deficient number, since it is larger than the sum of its proper divisors (4686853).

2638380707 is an equidigital number, since it uses as much as digits as its factorization.

2638380707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686852.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 2638380707 is about 51365.1701739613. The cubic root of 2638380707 is about 1381.8020124515.

The spelling of 2638380707 in words is "two billion, six hundred thirty-eight million, three hundred eighty thousand, seven hundred seven".