1308726730 has 16 divisors (see below), whose sum is σ = 2356687944. Its totient is φ = 523272960.

The previous prime is 1308726709. The next prime is 1308726733. The reversal of 1308726730 is 376278031.

It can be written as a sum of positive squares in 4 ways, for example, as 544148929 + 764577801 = 23327^2 + 27651^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1308726730.

It is not an unprimeable number, because it can be changed into a prime (1308726733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747 + ... + 51166.

Almost surely, 2^1308726730 is an apocalyptic number.

1308726730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1308726730 is a deficient number, since it is larger than the sum of its proper divisors (1047961214).

1308726730 is a wasteful number, since it uses less digits than its factorization.

1308726730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54441.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 1308726730 is about 36176.3283100980. The cubic root of 1308726730 is about 1093.8295646936.

The spelling of 1308726730 in words is "one billion, three hundred eight million, seven hundred twenty-six thousand, seven hundred thirty".