278785842 has 16 divisors (see below), whose sum is σ = 561124992. Its totient is φ = 92336400.

The previous prime is 278785823. The next prime is 278785853. The reversal of 278785842 is 248587872.

278785842 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147034 + ... + 148917.

It is an arithmetic number, because the mean of its divisors is an integer number (35070312).

Almost surely, 2^278785842 is an apocalyptic number.

278785842 is an abundant number, since it is smaller than the sum of its proper divisors (282339150).

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

278785842 is a wasteful number, since it uses less digits than its factorization.

278785842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296113.

The product of its digits is 2007040, while the sum is 51.

The square root of 278785842 is about 16696.8812057821. The cubic root of 278785842 is about 653.2662749328.

The spelling of 278785842 in words is "two hundred seventy-eight million, seven hundred eighty-five thousand, eight hundred forty-two".