278000856 has 128 divisors (see below), whose sum is σ = 929088000. Its totient is φ = 75240576.

The previous prime is 278000831. The next prime is 278000857. The reversal of 278000856 is 658000872.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 278000856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278000857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23890 + ... + 33566.

It is an arithmetic number, because the mean of its divisors is an integer number (7258500).

Almost surely, 2^278000856 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 278000856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464544000).

278000856 is an abundant number, since it is smaller than the sum of its proper divisors (651087144).

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

278000856 is a wasteful number, since it uses less digits than its factorization.

278000856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9718 (or 9708 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 278000856 is about 16673.3576702475. The cubic root of 278000856 is about 652.6525578018.

The spelling of 278000856 in words is "two hundred seventy-eight million, eight hundred fifty-six", and thus it is an aban number.