278196872 has 12 divisors (see below), whose sum is σ = 521707605. Its totient is φ = 139074848.

The previous prime is 278196869. The next prime is 278196889. The reversal of 278196872 is 278691872.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 214739716 + 63457156 = 14654^2 + 7966^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=11794.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 278196872.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 44228 + ... + 50124.

Almost surely, 2^278196872 is an apocalyptic number.

It is an amenable number.

278196872 is a deficient number, since it is larger than the sum of its proper divisors (243510733).

278196872 is an frugal number, since it uses more digits than its factorization.

278196872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11800 (or 5899 counting only the distinct ones).

The product of its digits is 677376, while the sum is 50.

The square root of 278196872 is about 16679.2347546283. The cubic root of 278196872 is about 652.8059149891.

Multiplying 278196872 by its sum of digits (50), we get a square (13909843600 = 117940²).

The spelling of 278196872 in words is "two hundred seventy-eight million, one hundred ninety-six thousand, eight hundred seventy-two".