3878478147 has 4 divisors (see below), whose sum is σ = 5171304200. Its totient is φ = 2585652096.

The previous prime is 3878478127. The next prime is 3878478161. The reversal of 3878478147 is 7418748783.

3878478147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3878478147 - 2⁸ = 3878477891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3878478127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646413022 + ... + 646413027.

It is an arithmetic number, because the mean of its divisors is an integer number (1292826050).

Almost surely, 2^3878478147 is an apocalyptic number.

3878478147 is a deficient number, since it is larger than the sum of its proper divisors (1292826053).

3878478147 is a wasteful number, since it uses less digits than its factorization.

3878478147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292826052.

The product of its digits is 8429568, while the sum is 57.

The square root of 3878478147 is about 62277.4288727465. The cubic root of 3878478147 is about 1571.1601290455.

The spelling of 3878478147 in words is "three billion, eight hundred seventy-eight million, four hundred seventy-eight thousand, one hundred forty-seven".