2638639085 has 8 divisors (see below), whose sum is σ = 3189147360. Its totient is φ = 2095724304.

The previous prime is 2638639049. The next prime is 2638639099. The reversal of 2638639085 is 5809368362.

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 2638639085 - 2⁸ = 2638638829 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897607 + ... + 1898996.

It is an arithmetic number, because the mean of its divisors is an integer number (398643420).

Almost surely, 2^2638639085 is an apocalyptic number.

It is an amenable number.

2638639085 is a deficient number, since it is larger than the sum of its proper divisors (550508275).

2638639085 is a wasteful number, since it uses less digits than its factorization.

2638639085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796747.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The square root of 2638639085 is about 51367.6852213529. The cubic root of 2638639085 is about 1381.8471178433.

The spelling of 2638639085 in words is "two billion, six hundred thirty-eight million, six hundred thirty-nine thousand, eighty-five".