278740968 has 64 divisors (see below), whose sum is σ = 761745600. Its totient is φ = 84295680.

The previous prime is 278740967. The next prime is 278740981. The reversal of 278740968 is 869047872.

It is a self number, because there is not a number n which added to its sum of digits gives 278740968.

It is not an unprimeable number, because it can be changed into a prime (278740967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202330 + ... + 203702.

It is an arithmetic number, because the mean of its divisors is an integer number (11902275).

Almost surely, 2^278740968 is an apocalyptic number.

It is an amenable number.

278740968 is an abundant number, since it is smaller than the sum of its proper divisors (483004632).

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

278740968 is a wasteful number, since it uses less digits than its factorization.

278740968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162 (or 2158 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 51.

The square root of 278740968 is about 16695.5373678118. The cubic root of 278740968 is about 653.2312226460.

The spelling of 278740968 in words is "two hundred seventy-eight million, seven hundred forty thousand, nine hundred sixty-eight".