1308965728 has 96 divisors (see below), whose sum is σ = 3132670464. Its totient is φ = 525576192.

The previous prime is 1308965699. The next prime is 1308965729. The reversal of 1308965728 is 8275698031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308965729) 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 15 ways as a sum of consecutive naturals, for example, 1000851 + ... + 1002157.

It is an arithmetic number, because the mean of its divisors is an integer number (32631984).

Almost surely, 2^1308965728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1308965728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1566335232).

1308965728 is an abundant number, since it is smaller than the sum of its proper divisors (1823704736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1308965728 is a wasteful number, since it uses less digits than its factorization.

1308965728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604 (or 1596 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 1308965728 is about 36179.6313966851. The cubic root of 1308965728 is about 1093.8961452257.

The spelling of 1308965728 in words is "one billion, three hundred eight million, nine hundred sixty-five thousand, seven hundred twenty-eight".