278847844680 has 64 divisors (see below), whose sum is σ = 865389873600. Its totient is φ = 71795306240.

The previous prime is 278847844679. The next prime is 278847844699. The reversal of 278847844680 is 86448748872.

It is a super-2 number, since 2×278847844680² (a number of 24 digits) contains 22 as substring.

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, 40060866 + ... + 40067825.

It is an arithmetic number, because the mean of its divisors is an integer number (13521716775).

Almost surely, 2^278847844680 is an apocalyptic number.

278847844680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278847844680 is an abundant number, since it is smaller than the sum of its proper divisors (586542028920).

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

278847844680 is a wasteful number, since it uses less digits than its factorization.

278847844680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80128734 (or 80128730 counting only the distinct ones).

The product of its (nonzero) digits is 154140672, while the sum is 66.

The spelling of 278847844680 in words is "two hundred seventy-eight billion, eight hundred forty-seven million, eight hundred forty-four thousand, six hundred eighty".