278795087880 has 256 divisors, whose sum is σ = 905400115200. Its totient is φ = 68466478080.

The previous prime is 278795087849. The next prime is 278795087899. The reversal of 278795087880 is 88780597872.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29369935 + ... + 29379425.

It is an arithmetic number, because the mean of its divisors is an integer number (3536719200).

Almost surely, 2^278795087880 is an apocalyptic number.

278795087880 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 278795087880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452700057600).

278795087880 is an abundant number, since it is smaller than the sum of its proper divisors (626605027320).

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

278795087880 is a wasteful number, since it uses less digits than its factorization.

278795087880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9924 (or 9920 counting only the distinct ones).

The product of its (nonzero) digits is 126443520, while the sum is 69.

The spelling of 278795087880 in words is "two hundred seventy-eight billion, seven hundred ninety-five million, eighty-seven thousand, eight hundred eighty".