1280914668 has 96 divisors (see below), whose sum is σ = 3739760640. Its totient is φ = 375624000.

The previous prime is 1280914667. The next prime is 1280914669. The reversal of 1280914668 is 8664190821.

It is an interprime number because it is at equal distance from previous prime (1280914667) and next prime (1280914669).

It is not an unprimeable number, because it can be changed into a prime (1280914667) 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, 19438 + ... + 54218.

It is an arithmetic number, because the mean of its divisors is an integer number (38955840).

Almost surely, 2^1280914668 is an apocalyptic number.

1280914668 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 1280914668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1869880320).

1280914668 is an abundant number, since it is smaller than the sum of its proper divisors (2458845972).

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

1280914668 is a wasteful number, since it uses less digits than its factorization.

1280914668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34836 (or 34828 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1280914668 is about 35789.8682311070. The cubic root of 1280914668 is about 1086.0256091150.

The spelling of 1280914668 in words is "one billion, two hundred eighty million, nine hundred fourteen thousand, six hundred sixty-eight".