1278482280 has 128 divisors (see below), whose sum is σ = 4112985600. Its totient is φ = 316772352.

The previous prime is 1278482251. The next prime is 1278482299. The reversal of 1278482280 is 822848721.

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 31 ways as a sum of consecutive naturals, for example, 157194 + ... + 165126.

It is an arithmetic number, because the mean of its divisors is an integer number (32132700).

Almost surely, 2^1278482280 is an apocalyptic number.

1278482280 is a gapful number since it is divisible by the number (10) 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 1278482280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2056492800).

1278482280 is an abundant number, since it is smaller than the sum of its proper divisors (2834503320).

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

1278482280 is a wasteful number, since it uses less digits than its factorization.

1278482280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8043 (or 8039 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 42.

The square root of 1278482280 is about 35755.8705669433. The cubic root of 1278482280 is about 1085.3377387987.

The spelling of 1278482280 in words is "one billion, two hundred seventy-eight million, four hundred eighty-two thousand, two hundred eighty".