1279900960 has 48 divisors (see below), whose sum is σ = 3256368696. Its totient is φ = 472578048.

The previous prime is 1279900943. The next prime is 1279900967. The reversal of 1279900960 is 690099721.

It can be written as a sum of positive squares in 4 ways, for example, as 701402256 + 578498704 = 26484^2 + 24052^2 .

It is not an unprimeable number, because it can be changed into a prime (1279900967) 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 7 ways as a sum of consecutive naturals, for example, 305589 + ... + 309748.

Almost surely, 2^1279900960 is an apocalyptic number.

1279900960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1279900960 is an abundant number, since it is smaller than the sum of its proper divisors (1976467736).

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

1279900960 is a wasteful number, since it uses less digits than its factorization.

1279900960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615365 (or 615357 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 1279900960 is about 35775.7034871433. The cubic root of 1279900960 is about 1085.7390421739.

The spelling of 1279900960 in words is "one billion, two hundred seventy-nine million, nine hundred thousand, nine hundred sixty".