1279980988 has 48 divisors (see below), whose sum is σ = 2647340640. Its totient is φ = 537014400.

The previous prime is 1279980959. The next prime is 1279981007. The reversal of 1279980988 is 8890899721.

It is a super-2 number, since 2×1279980988² = 3276702659282912288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90048 + ... + 103288.

It is an arithmetic number, because the mean of its divisors is an integer number (55152930).

Almost surely, 2^1279980988 is an apocalyptic number.

It is an amenable number.

1279980988 is an abundant number, since it is smaller than the sum of its proper divisors (1367359652).

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

1279980988 is a wasteful number, since it uses less digits than its factorization.

1279980988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13295 (or 13267 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 61.

The square root of 1279980988 is about 35776.8219382326. The cubic root of 1279980988 is about 1085.7616709335.

The spelling of 1279980988 in words is "one billion, two hundred seventy-nine million, nine hundred eighty thousand, nine hundred eighty-eight".