1272808806 has 16 divisors (see below), whose sum is σ = 2614418544. Its totient is φ = 412802784.

The previous prime is 1272808777. The next prime is 1272808807. The reversal of 1272808806 is 6088082721.

It is a super-2 number, since 2×1272808806² = 3240084513262291272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272808807) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2866465 + ... + 2866908.

It is an arithmetic number, because the mean of its divisors is an integer number (163401159).

Almost surely, 2^1272808806 is an apocalyptic number.

1272808806 is an abundant number, since it is smaller than the sum of its proper divisors (1341609738).

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

1272808806 is a wasteful number, since it uses less digits than its factorization.

1272808806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5733415.

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 1272808806 is about 35676.4460954283. The cubic root of 1272808806 is about 1083.7299035903.

The spelling of 1272808806 in words is "one billion, two hundred seventy-two million, eight hundred eight thousand, eight hundred six".