1280582664 has 64 divisors (see below), whose sum is σ = 3394794240. Its totient is φ = 401157120.

The previous prime is 1280582663. The next prime is 1280582671. The reversal of 1280582664 is 4662850821.

It is not an unprimeable number, because it can be changed into a prime (1280582663) 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, 333057 + ... + 336879.

It is an arithmetic number, because the mean of its divisors is an integer number (53043660).

Almost surely, 2^1280582664 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 1280582664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1697397120).

1280582664 is an abundant number, since it is smaller than the sum of its proper divisors (2114211576).

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

1280582664 is a wasteful number, since it uses less digits than its factorization.

1280582664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4670 (or 4666 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 1280582664 is about 35785.2296904743. The cubic root of 1280582664 is about 1085.9317709612.

The spelling of 1280582664 in words is "one billion, two hundred eighty million, five hundred eighty-two thousand, six hundred sixty-four".