278877860820 has 96 divisors (see below), whose sum is σ = 934360035840. Its totient is φ = 68646856320.

The previous prime is 278877860803. The next prime is 278877860897. The reversal of 278877860820 is 28068778872.

278877860820 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×278877860820² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19856076 + ... + 19870115.

It is an arithmetic number, because the mean of its divisors is an integer number (9732917040).

Almost surely, 2^278877860820 is an apocalyptic number.

278877860820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278877860820 is an abundant number, since it is smaller than the sum of its proper divisors (655482175020).

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

278877860820 is a wasteful number, since it uses less digits than its factorization.

278877860820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39726222 (or 39726214 counting only the distinct ones).

The product of its (nonzero) digits is 33718272, while the sum is 63.

The spelling of 278877860820 in words is "two hundred seventy-eight billion, eight hundred seventy-seven million, eight hundred sixty thousand, eight hundred twenty".