3838728122778 has 16 divisors (see below), whose sum is σ = 8129071319040. Its totient is φ = 1204306862016.

The previous prime is 3838728122737. The next prime is 3838728122881. The reversal of 3838728122778 is 8772218278383.

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, 18817294618 + ... + 18817294821.

It is an arithmetic number, because the mean of its divisors is an integer number (508066957440).

Almost surely, 2^{3838728122778} is an apocalyptic number.

3838728122778 is an abundant number, since it is smaller than the sum of its proper divisors (4290343196262).

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

3838728122778 is a wasteful number, since it uses less digits than its factorization.

3838728122778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37634589461.

The product of its digits is 101154816, while the sum is 66.

The spelling of 3838728122778 in words is "three trillion, eight hundred thirty-eight billion, seven hundred twenty-eight million, one hundred twenty-two thousand, seven hundred seventy-eight".