278748847872 has 216 divisors, whose sum is σ = 893312482608. Its totient is φ = 82875187200.

The previous prime is 278748847849. The next prime is 278748847919.

278748847872 is a `hidden beast` number, since 2 + 7 + 8 + 7 + 4 + 88 + 478 + 72 = 666.

278748847872 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 278748847872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1239472 + ... + 1446992.

It is an arithmetic number, because the mean of its divisors is an integer number (4135705938).

Almost surely, 2^278748847872 is an apocalyptic number.

278748847872 is a gapful number since it is divisible by the number (22) 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 278748847872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (446656241304).

278748847872 is an abundant number, since it is smaller than the sum of its proper divisors (614563634736).

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

278748847872 is a wasteful number, since it uses less digits than its factorization.

278748847872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207607 (or 207590 counting only the distinct ones).

The product of its digits is 629407744, while the sum is 72.

The spelling of 278748847872 in words is "two hundred seventy-eight billion, seven hundred forty-eight million, eight hundred forty-seven thousand, eight hundred seventy-two".