278197968 has 120 divisors (see below), whose sum is σ = 767358624. Its totient is φ = 86780160.

The previous prime is 278197961. The next prime is 278197991. The reversal of 278197968 is 869791872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278197961) 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 23 ways as a sum of consecutive naturals, for example, 1706655 + ... + 1706817.

Almost surely, 2^278197968 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 278197968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383679312).

278197968 is an abundant number, since it is smaller than the sum of its proper divisors (489160656).

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

278197968 is a wasteful number, since it uses less digits than its factorization.

278197968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 236 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 57.

The square root of 278197968 is about 16679.2676098203. The cubic root of 278197968 is about 652.8067722649.

The spelling of 278197968 in words is "two hundred seventy-eight million, one hundred ninety-seven thousand, nine hundred sixty-eight".