1309872730 has 16 divisors (see below), whose sum is σ = 2481864480. Its totient is φ = 496372752.

The previous prime is 1309872691. The next prime is 1309872731. The reversal of 1309872730 is 372789031.

It is not an unprimeable number, because it can be changed into a prime (1309872731) 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, 3446844 + ... + 3447223.

It is an arithmetic number, because the mean of its divisors is an integer number (155116530).

Almost surely, 2^1309872730 is an apocalyptic number.

1309872730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1309872730 is a deficient number, since it is larger than the sum of its proper divisors (1171991750).

1309872730 is a wasteful number, since it uses less digits than its factorization.

1309872730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6894093.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 1309872730 is about 36192.1639308843. The cubic root of 1309872730 is about 1094.1487459104.

The spelling of 1309872730 in words is "one billion, three hundred nine million, eight hundred seventy-two thousand, seven hundred thirty".