278712960 has 128 divisors (see below), whose sum is σ = 940766400. Its totient is φ = 69943296.

The previous prime is 278712947. The next prime is 278712983. The reversal of 278712960 is 69217872.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28371 + ... + 36909.

Almost surely, 2^278712960 is an apocalyptic number.

278712960 is a gapful number since it is divisible by the number (20) 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 278712960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470383200).

278712960 is an abundant number, since it is smaller than the sum of its proper divisors (662053440).

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

278712960 is a wasteful number, since it uses less digits than its factorization.

278712960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8578 (or 8566 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 278712960 is about 16694.6985597225. The cubic root of 278712960 is about 653.2093429381.

The spelling of 278712960 in words is "two hundred seventy-eight million, seven hundred twelve thousand, nine hundred sixty".