1320888266 has 8 divisors (see below), whose sum is σ = 2013813444. Its totient is φ = 649617120.

The previous prime is 1320888263. The next prime is 1320888281. The reversal of 1320888266 is 6628880231.

It can be written as a sum of positive squares in 2 ways, for example, as 1319796241 + 1092025 = 36329^2 + 1045^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1320888266² = 3489491622512973512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1320888263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5413355 + ... + 5413598.

Almost surely, 2^1320888266 is an apocalyptic number.

1320888266 is a deficient number, since it is larger than the sum of its proper divisors (692925178).

1320888266 is a wasteful number, since it uses less digits than its factorization.

1320888266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10827016.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 1320888266 is about 36344.0265518283. The cubic root of 1320888266 is about 1097.2073142621.

The spelling of 1320888266 in words is "one billion, three hundred twenty million, eight hundred eighty-eight thousand, two hundred sixty-six".