1305872806 has 8 divisors (see below), whose sum is σ = 2238639120. Its totient is φ = 559659768.

The previous prime is 1305872779. The next prime is 1305872807. The reversal of 1305872806 is 6082785031.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305872807) 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, 46638301 + ... + 46638328.

It is an arithmetic number, because the mean of its divisors is an integer number (279829890).

Almost surely, 2^1305872806 is an apocalyptic number.

1305872806 is a deficient number, since it is larger than the sum of its proper divisors (932766314).

1305872806 is an equidigital number, since it uses as much as digits as its factorization.

1305872806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93276638.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 1305872806 is about 36136.8621493344. The cubic root of 1305872806 is about 1093.0338858903.

The spelling of 1305872806 in words is "one billion, three hundred five million, eight hundred seventy-two thousand, eight hundred six".