3878278289 has 8 divisors (see below), whose sum is σ = 4122395208. Its totient is φ = 3635937280.

The previous prime is 3878278259. The next prime is 3878278307. The reversal of 3878278289 is 9828728783.

3878278289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3201862225 + 676416064 = 56585^2 + 26008^2 .

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 3878278289 - 2¹² = 3878274193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3878278259) 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, 439472 + ... + 448209.

It is an arithmetic number, because the mean of its divisors is an integer number (515299401).

Almost surely, 2^3878278289 is an apocalyptic number.

It is an amenable number.

3878278289 is a deficient number, since it is larger than the sum of its proper divisors (244116919).

3878278289 is a wasteful number, since it uses less digits than its factorization.

3878278289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887955.

The product of its digits is 21676032, while the sum is 62.

The square root of 3878278289 is about 62275.8242739508. The cubic root of 3878278289 is about 1571.1331412852.

The spelling of 3878278289 in words is "three billion, eight hundred seventy-eight million, two hundred seventy-eight thousand, two hundred eighty-nine".