278488560 has 320 divisors, whose sum is σ = 1071360000. Its totient is φ = 59609088.

The previous prime is 278488559. The next prime is 278488627. The reversal of 278488560 is 65884872.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1399341 + ... + 1399539.

It is an arithmetic number, because the mean of its divisors is an integer number (3348000).

Almost surely, 2^278488560 is an apocalyptic number.

278488560 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 278488560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (535680000).

278488560 is an abundant number, since it is smaller than the sum of its proper divisors (792871440).

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

278488560 is a wasteful number, since it uses less digits than its factorization.

278488560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 48.

The square root of 278488560 is about 16687.9765100506. The cubic root of 278488560 is about 653.0339898522.

The spelling of 278488560 in words is "two hundred seventy-eight million, four hundred eighty-eight thousand, five hundred sixty".