2638831879 has 8 divisors (see below), whose sum is σ = 2768612480. Its totient is φ = 2511842400.

The previous prime is 2638831859. The next prime is 2638831901. The reversal of 2638831879 is 9781388362.

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 2638831879 - 2¹⁹ = 2638307591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638831849) 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, 695844 + ... + 699625.

It is an arithmetic number, because the mean of its divisors is an integer number (346076560).

Almost surely, 2^2638831879 is an apocalyptic number.

2638831879 is a deficient number, since it is larger than the sum of its proper divisors (129780601).

2638831879 is a wasteful number, since it uses less digits than its factorization.

2638831879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395561.

The product of its digits is 3483648, while the sum is 55.

The square root of 2638831879 is about 51369.5617948995. The cubic root of 2638831879 is about 1381.8807722306.

The spelling of 2638831879 in words is "two billion, six hundred thirty-eight million, eight hundred thirty-one thousand, eight hundred seventy-nine".