1349808728 has 16 divisors (see below), whose sum is σ = 2640930480. Its totient is φ = 645560608.

The previous prime is 1349808709. The next prime is 1349808739. The reversal of 1349808728 is 8278089431.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3667775 + ... + 3668142.

It is an arithmetic number, because the mean of its divisors is an integer number (165058155).

Almost surely, 2^1349808728 is an apocalyptic number.

It is an amenable number.

1349808728 is a deficient number, since it is larger than the sum of its proper divisors (1291121752).

1349808728 is a wasteful number, since it uses less digits than its factorization.

1349808728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335946 (or 7335942 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The square root of 1349808728 is about 36739.7431673113. The cubic root of 1349808728 is about 1105.1572506770.

The spelling of 1349808728 in words is "one billion, three hundred forty-nine million, eight hundred eight thousand, seven hundred twenty-eight".