1227828813 has 16 divisors (see below), whose sum is σ = 1655949120. Its totient is φ = 809150976.

The previous prime is 1227828787. The next prime is 1227828817. The reversal of 1227828813 is 3188287221.

1227828813 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1227828813 - 2²⁰ = 1226780237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227828817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309106 + ... + 313052.

It is an arithmetic number, because the mean of its divisors is an integer number (103496820).

Almost surely, 2^1227828813 is an apocalyptic number.

It is an amenable number.

1227828813 is a deficient number, since it is larger than the sum of its proper divisors (428120307).

1227828813 is a wasteful number, since it uses less digits than its factorization.

1227828813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5116.

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

The square root of 1227828813 is about 35040.3883112045. The cubic root of 1227828813 is about 1070.8104649513.

The spelling of 1227828813 in words is "one billion, two hundred twenty-seven million, eight hundred twenty-eight thousand, eight hundred thirteen".