3878782538 has 8 divisors (see below), whose sum is σ = 6018800580. Its totient is φ = 1872515680.

The previous prime is 3878782507. The next prime is 3878782547. The reversal of 3878782538 is 8352878783.

It can be written as a sum of positive squares in 2 ways, for example, as 3865481929 + 13300609 = 62173^2 + 3647^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33437723 + ... + 33437838.

Almost surely, 2^3878782538 is an apocalyptic number.

3878782538 is a deficient number, since it is larger than the sum of its proper divisors (2140018042).

3878782538 is a wasteful number, since it uses less digits than its factorization.

3878782538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66875592.

The product of its digits is 18063360, while the sum is 59.

The square root of 3878782538 is about 62279.8726556180. The cubic root of 3878782538 is about 1571.2012306042.

The spelling of 3878782538 in words is "three billion, eight hundred seventy-eight million, seven hundred eighty-two thousand, five hundred thirty-eight".