1280458660 has 24 divisors (see below), whose sum is σ = 2895807096. Its totient is φ = 472784640.

The previous prime is 1280458657. The next prime is 1280458661. The reversal of 1280458660 is 668540821.

It can be written as a sum of positive squares in 4 ways, for example, as 119421184 + 1161037476 = 10928^2 + 34074^2 .

It is not an unprimeable number, because it can be changed into a prime (1280458661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2462161 + ... + 2462680.

It is an arithmetic number, because the mean of its divisors is an integer number (120658629).

Almost surely, 2^1280458660 is an apocalyptic number.

1280458660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280458660 is an abundant number, since it is smaller than the sum of its proper divisors (1615348436).

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

1280458660 is a wasteful number, since it uses less digits than its factorization.

1280458660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4924863 (or 4924861 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 1280458660 is about 35783.4970342475. The cubic root of 1280458660 is about 1085.8967181076.

The spelling of 1280458660 in words is "one billion, two hundred eighty million, four hundred fifty-eight thousand, six hundred sixty".