278906379528 has 256 divisors, whose sum is σ = 824487966720. Its totient is φ = 76985137152.

The previous prime is 278906379497. The next prime is 278906379541. The reversal of 278906379528 is 825973609872.

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, 161871675 + ... + 161873397.

It is an arithmetic number, because the mean of its divisors is an integer number (3220656120).

Almost surely, 2^278906379528 is an apocalyptic number.

278906379528 is a gapful number since it is divisible by the number (28) 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 278906379528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (412243983360).

278906379528 is an abundant number, since it is smaller than the sum of its proper divisors (545581587192).

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

278906379528 is a wasteful number, since it uses less digits than its factorization.

278906379528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076 (or 2072 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 66.

The spelling of 278906379528 in words is "two hundred seventy-eight billion, nine hundred six million, three hundred seventy-nine thousand, five hundred twenty-eight".