1280168352 has 36 divisors (see below), whose sum is σ = 3640479570. Its totient is φ = 426722688.

The previous prime is 1280168347. The next prime is 1280168353. The reversal of 1280168352 is 2538610821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1175392656 + 104775696 = 34284^2 + 10236^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1280168353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2222227 + ... + 2222802.

Almost surely, 2^1280168352 is an apocalyptic number.

1280168352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1280168352 is an abundant number, since it is smaller than the sum of its proper divisors (2360311218).

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

1280168352 is a wasteful number, since it uses less digits than its factorization.

1280168352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4445045 (or 4445034 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1280168352 is about 35779.4403533649. The cubic root of 1280168352 is about 1085.8146463881.

The spelling of 1280168352 in words is "one billion, two hundred eighty million, one hundred sixty-eight thousand, three hundred fifty-two".