1288427166 has 24 divisors (see below), whose sum is σ = 3006330600. Its totient is φ = 396439056.

The previous prime is 1288427159. The next prime is 1288427171. The reversal of 1288427166 is 6617248821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2752816 + ... + 2753283.

It is an arithmetic number, because the mean of its divisors is an integer number (125263775).

Almost surely, 2^1288427166 is an apocalyptic number.

1288427166 is an abundant number, since it is smaller than the sum of its proper divisors (1717903434).

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

1288427166 is a wasteful number, since it uses less digits than its factorization.

1288427166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5506120 (or 5506117 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 1288427166 is about 35894.6676541238. The cubic root of 1288427166 is about 1088.1446331071.

The spelling of 1288427166 in words is "one billion, two hundred eighty-eight million, four hundred twenty-seven thousand, one hundred sixty-six".