1279229872 has 40 divisors (see below), whose sum is σ = 2762434800. Its totient is φ = 570304512.

The previous prime is 1279229867. The next prime is 1279229899. The reversal of 1279229872 is 2789229721.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118597 + ... + 128932.

It is an arithmetic number, because the mean of its divisors is an integer number (69060870).

Almost surely, 2^1279229872 is an apocalyptic number.

It is an amenable number.

1279229872 is an abundant number, since it is smaller than the sum of its proper divisors (1483204928).

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

1279229872 is a wasteful number, since it uses less digits than its factorization.

1279229872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247573 (or 247567 counting only the distinct ones).

The product of its digits is 508032, while the sum is 49.

The square root of 1279229872 is about 35766.3231546101. The cubic root of 1279229872 is about 1085.5492478464.

The spelling of 1279229872 in words is "one billion, two hundred seventy-nine million, two hundred twenty-nine thousand, eight hundred seventy-two".