1280564168 has 64 divisors (see below), whose sum is σ = 2744325360. Its totient is φ = 554950656.

The previous prime is 1280564149. The next prime is 1280564189. The reversal of 1280564168 is 8614650821.

It can be written as a sum of positive squares in 8 ways, for example, as 48413764 + 1232150404 = 6958^2 + 35102^2 .

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, 1366196 + ... + 1367132.

Almost surely, 2^1280564168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280564168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1372162680).

1280564168 is an abundant number, since it is smaller than the sum of its proper divisors (1463761192).

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

1280564168 is a wasteful number, since it uses less digits than its factorization.

1280564168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746 (or 1742 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 1280564168 is about 35784.9712588958. The cubic root of 1280564168 is about 1085.9265427446.

The spelling of 1280564168 in words is "one billion, two hundred eighty million, five hundred sixty-four thousand, one hundred sixty-eight".