1288327266 has 24 divisors (see below), whose sum is σ = 2792197980. Its totient is φ = 429315936.

The previous prime is 1288327253. The next prime is 1288327273. The reversal of 1288327266 is 6627238821.

It can be written as a sum of positive squares in 2 ways, for example, as 935075241 + 353252025 = 30579^2 + 18795^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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, 68140 + ... + 84968.

Almost surely, 2^1288327266 is an apocalyptic number.

1288327266 is an abundant number, since it is smaller than the sum of its proper divisors (1503870714).

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

1288327266 is a wasteful number, since it uses less digits than its factorization.

1288327266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21090 (or 21087 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 1288327266 is about 35893.2760555511. The cubic root of 1288327266 is about 1088.1165087755.

The spelling of 1288327266 in words is "one billion, two hundred eighty-eight million, three hundred twenty-seven thousand, two hundred sixty-six".