1280574660 has 96 divisors (see below), whose sum is σ = 3711762432. Its totient is φ = 329535360.

The previous prime is 1280574593. The next prime is 1280574661. The reversal of 1280574660 is 664750821.

It is not an unprimeable number, because it can be changed into a prime (1280574661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 860437 + ... + 861923.

It is an arithmetic number, because the mean of its divisors is an integer number (38664192).

Almost surely, 2^1280574660 is an apocalyptic number.

1280574660 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 1280574660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1855881216).

1280574660 is an abundant number, since it is smaller than the sum of its proper divisors (2431187772).

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

1280574660 is a wasteful number, since it uses less digits than its factorization.

1280574660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993 (or 1991 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 1280574660 is about 35785.1178564498. The cubic root of 1280574660 is about 1085.9295084973.

The spelling of 1280574660 in words is "one billion, two hundred eighty million, five hundred seventy-four thousand, six hundred sixty".