2749138638 has 8 divisors (see below), whose sum is σ = 5498277288. Its totient is φ = 916379544.

The previous prime is 2749138627. The next prime is 2749138649. The reversal of 2749138638 is 8368319472.

It is an interprime number because it is at equal distance from previous prime (2749138627) and next prime (2749138649).

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

2749138638 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 229094881 + ... + 229094892.

It is an arithmetic number, because the mean of its divisors is an integer number (687284661).

Almost surely, 2^2749138638 is an apocalyptic number.

2749138638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2749138638 is a wasteful number, since it uses less digits than its factorization.

2749138638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458189778.

The product of its digits is 1741824, while the sum is 51.

The square root of 2749138638 is about 52432.2290008731. The cubic root of 2749138638 is about 1400.8733730707.

The spelling of 2749138638 in words is "two billion, seven hundred forty-nine million, one hundred thirty-eight thousand, six hundred thirty-eight".