278068859920 has 80 divisors (see below), whose sum is σ = 685213987248. Its totient is φ = 104581693440.

The previous prime is 278068859917. The next prime is 278068859947. The reversal of 278068859920 is 29958860872.

It can be written as a sum of positive squares in 8 ways, for example, as 30936588544 + 247132271376 = 175888^2 + 497124^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1288432 + ... + 1488688.

Almost surely, 2^278068859920 is an apocalyptic number.

278068859920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278068859920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342606993624).

278068859920 is an abundant number, since it is smaller than the sum of its proper divisors (407145127328).

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

278068859920 is a wasteful number, since it uses less digits than its factorization.

278068859920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201308 (or 201302 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 64.

The spelling of 278068859920 in words is "two hundred seventy-eight billion, sixty-eight million, eight hundred fifty-nine thousand, nine hundred twenty".