2638750139 has 8 divisors (see below), whose sum is σ = 2708569200. Its totient is φ = 2569788000.

The previous prime is 2638750129. The next prime is 2638750171. The reversal of 2638750139 is 9310578362.

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 2638750139 - 2²⁴ = 2621972923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2638750139.

It is not an unprimeable number, because it can be changed into a prime (2638750129) 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, 207989 + ... + 220310.

It is an arithmetic number, because the mean of its divisors is an integer number (338571150).

Almost surely, 2^2638750139 is an apocalyptic number.

2638750139 is a deficient number, since it is larger than the sum of its proper divisors (69819061).

2638750139 is a wasteful number, since it uses less digits than its factorization.

2638750139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428461.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 2638750139 is about 51368.7661814064. The cubic root of 2638750139 is about 1381.8665037833.

The spelling of 2638750139 in words is "two billion, six hundred thirty-eight million, seven hundred fifty thousand, one hundred thirty-nine".