3878129742 has 16 divisors (see below), whose sum is σ = 7758329040. Its totient is φ = 1292364992.

The previous prime is 3878129687. The next prime is 3878129747. The reversal of 3878129742 is 2479218783.

3878129742 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878129747) 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, 61317 + ... + 107312.

It is an arithmetic number, because the mean of its divisors is an integer number (484895565).

Almost surely, 2^3878129742 is an apocalyptic number.

3878129742 is an abundant number, since it is smaller than the sum of its proper divisors (3880199298).

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

3878129742 is a wasteful number, since it uses less digits than its factorization.

3878129742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172467.

The product of its digits is 1354752, while the sum is 51.

The square root of 3878129742 is about 62274.6316087056. The cubic root of 3878129742 is about 1571.1130816886.

The spelling of 3878129742 in words is "three billion, eight hundred seventy-eight million, one hundred twenty-nine thousand, seven hundred forty-two".