278897798872 has 64 divisors (see below), whose sum is σ = 652762252800. Its totient is φ = 108529251840.

The previous prime is 278897798867. The next prime is 278897798917.

It is a happy number.

278897798872 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231904 + ... + 782032.

It is an arithmetic number, because the mean of its divisors is an integer number (10199410200).

Almost surely, 2^278897798872 is an apocalyptic number.

278897798872 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 278897798872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326381126400).

278897798872 is an abundant number, since it is smaller than the sum of its proper divisors (373864453928).

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

278897798872 is a wasteful number, since it uses less digits than its factorization.

278897798872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550976 (or 550972 counting only the distinct ones).

The product of its digits is 3186376704, while the sum is 82.

The spelling of 278897798872 in words is "two hundred seventy-eight billion, eight hundred ninety-seven million, seven hundred ninety-eight thousand, eight hundred seventy-two".