1308728 has 16 divisors (see below), whose sum is σ = 2598480. Its totient is φ = 615808.

The previous prime is 1308719. The next prime is 1308731. The reversal of 1308728 is 8278031.

It is a self number, because there is not a number n which added to its sum of digits gives 1308728.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4676 + ... + 4947.

It is an arithmetic number, because the mean of its divisors is an integer number (162405).

2^1308728 is an apocalyptic number.

It is an amenable number.

1308728 is a deficient number, since it is larger than the sum of its proper divisors (1289752).

1308728 is a wasteful number, since it uses less digits than its factorization.

1308728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9646 (or 9642 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1308728 is about 1143.9965034912. The cubic root of 1308728 is about 109.3829918514.

The spelling of 1308728 in words is "one million, three hundred eight thousand, seven hundred twenty-eight".