278343968 has 48 divisors (see below), whose sum is σ = 628254144. Its totient is φ = 118913280.

The previous prime is 278343937. The next prime is 278343979. The reversal of 278343968 is 869343872.

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, 75938 + ... + 79518.

It is an arithmetic number, because the mean of its divisors is an integer number (13088628).

Almost surely, 2^278343968 is an apocalyptic number.

278343968 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 278343968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314127072).

278343968 is an abundant number, since it is smaller than the sum of its proper divisors (349910176).

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

278343968 is a wasteful number, since it uses less digits than its factorization.

278343968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945 (or 3937 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The square root of 278343968 is about 16683.6437267163. The cubic root of 278343968 is about 652.9209512927.

The spelling of 278343968 in words is "two hundred seventy-eight million, three hundred forty-three thousand, nine hundred sixty-eight".