1279208064 has 128 divisors (see below), whose sum is σ = 3495401280. Its totient is φ = 414351360.

The previous prime is 1279208039. The next prime is 1279208069. The reversal of 1279208064 is 4608029721.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (1279208069) 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 15 ways as a sum of consecutive naturals, for example, 2271847 + ... + 2272409.

Almost surely, 2^1279208064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1279208064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1747700640).

1279208064 is an abundant number, since it is smaller than the sum of its proper divisors (2216193216).

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

1279208064 is an equidigital number, since it uses as much as digits as its factorization.

1279208064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 1279208064 is about 35766.0182855179. The cubic root of 1279208064 is about 1085.5430790848.

The spelling of 1279208064 in words is "one billion, two hundred seventy-nine million, two hundred eight thousand, sixty-four".