1309628 has 6 divisors (see below), whose sum is σ = 2291856. Its totient is φ = 654812.

The previous prime is 1309601. The next prime is 1309631. The reversal of 1309628 is 8269031.

It is a self number, because there is not a number n which added to its sum of digits gives 1309628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163700 + ... + 163707.

It is an arithmetic number, because the mean of its divisors is an integer number (381976).

2^1309628 is an apocalyptic number.

It is an amenable number.

1309628 is a deficient number, since it is larger than the sum of its proper divisors (982228).

1309628 is a wasteful number, since it uses less digits than its factorization.

1309628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327411 (or 327409 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1309628 is about 1144.3897937329. The cubic root of 1309628 is about 109.4080599926.

The spelling of 1309628 in words is "one million, three hundred nine thousand, six hundred twenty-eight".