278820848 has 40 divisors (see below), whose sum is σ = 561459600. Its totient is φ = 133973504.

The previous prime is 278820847. The next prime is 278820887. The reversal of 278820848 is 848028872.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278820847) 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, 106823 + ... + 109401.

It is an arithmetic number, because the mean of its divisors is an integer number (14036490).

Almost surely, 2^278820848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278820848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280729800).

278820848 is an abundant number, since it is smaller than the sum of its proper divisors (282638752).

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

278820848 is a wasteful number, since it uses less digits than its factorization.

278820848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2849 (or 2843 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 47.

The square root of 278820848 is about 16697.9294524800. The cubic root of 278820848 is about 653.2936164481.

The spelling of 278820848 in words is "two hundred seventy-eight million, eight hundred twenty thousand, eight hundred forty-eight".