1280879568 has 200 divisors, whose sum is σ = 3917124288. Its totient is φ = 403273728.

The previous prime is 1280879549. The next prime is 1280879597. The reversal of 1280879568 is 8659780821.

1280879568 is a `hidden beast` number, since 1 + 2 + 8 + 0 + 8 + 79 + 568 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2891155 + ... + 2891597.

Almost surely, 2^1280879568 is an apocalyptic number.

1280879568 is a gapful number since it is divisible by the number (18) 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 1280879568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1958562144).

1280879568 is an abundant number, since it is smaller than the sum of its proper divisors (2636244720).

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

1280879568 is a wasteful number, since it uses less digits than its factorization.

1280879568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The square root of 1280879568 is about 35789.3778655064. The cubic root of 1280879568 is about 1086.0156891601.

The spelling of 1280879568 in words is "one billion, two hundred eighty million, eight hundred seventy-nine thousand, five hundred sixty-eight".