1309728698 has 16 divisors (see below), whose sum is σ = 2051191296. Its totient is φ = 626031120.

The previous prime is 1309728677. The next prime is 1309728709. The reversal of 1309728698 is 8968279031.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83543 + ... + 97973.

It is an arithmetic number, because the mean of its divisors is an integer number (128199456).

Almost surely, 2^1309728698 is an apocalyptic number.

1309728698 is a deficient number, since it is larger than the sum of its proper divisors (741462598).

1309728698 is a wasteful number, since it uses less digits than its factorization.

1309728698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16429.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 1309728698 is about 36190.1740531874. The cubic root of 1309728698 is about 1094.1086406887.

The spelling of 1309728698 in words is "one billion, three hundred nine million, seven hundred twenty-eight thousand, six hundred ninety-eight".