5278678638 has 8 divisors (see below), whose sum is σ = 10557357288. Its totient is φ = 1759559544.

The previous prime is 5278678541. The next prime is 5278678663. The reversal of 5278678638 is 8368768725.

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

5278678638 is an admirable number.

It is a congruent number.

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, 439889881 + ... + 439889892.

It is an arithmetic number, because the mean of its divisors is an integer number (1319669661).

Almost surely, 2^5278678638 is an apocalyptic number.

5278678638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

5278678638 is a wasteful number, since it uses less digits than its factorization.

5278678638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879779778.

The product of its digits is 27095040, while the sum is 60.

The square root of 5278678638 is about 72654.5156063957. The cubic root of 5278678638 is about 1741.1722665938.

The spelling of 5278678638 in words is "five billion, two hundred seventy-eight million, six hundred seventy-eight thousand, six hundred thirty-eight".