2638946238 has 32 divisors (see below), whose sum is σ = 5452846080. Its totient is φ = 850538880.

The previous prime is 2638946231. The next prime is 2638946273. The reversal of 2638946238 is 8326498362.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638946231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235773 + ... + 246711.

It is an arithmetic number, because the mean of its divisors is an integer number (170401440).

Almost surely, 2^2638946238 is an apocalyptic number.

2638946238 is an abundant number, since it is smaller than the sum of its proper divisors (2813899842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2638946238 is a wasteful number, since it uses less digits than its factorization.

2638946238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12272.

The product of its digits is 2985984, while the sum is 51.

The square root of 2638946238 is about 51370.6748836338. The cubic root of 2638946238 is about 1381.9007341213.

It can be divided in two parts, 26389 and 46238, that added together give a palindrome (72627).

The spelling of 2638946238 in words is "two billion, six hundred thirty-eight million, nine hundred forty-six thousand, two hundred thirty-eight".