278765802228 has 24 divisors (see below), whose sum is σ = 666318260160. Its totient is φ = 90655545280.

The previous prime is 278765802221. The next prime is 278765802229. The reversal of 278765802228 is 822208567872.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278765802221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283298088 + ... + 283299071.

It is an arithmetic number, because the mean of its divisors is an integer number (27763260840).

Almost surely, 2^278765802228 is an apocalyptic number.

It is an amenable number.

278765802228 is an abundant number, since it is smaller than the sum of its proper divisors (387552457932).

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

278765802228 is a wasteful number, since it uses less digits than its factorization.

278765802228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566597207 (or 566597205 counting only the distinct ones).

The product of its (nonzero) digits is 12042240, while the sum is 57.

The spelling of 278765802228 in words is "two hundred seventy-eight billion, seven hundred sixty-five million, eight hundred two thousand, two hundred twenty-eight".