1017728 has 16 divisors (see below), whose sum is σ = 2027760. Its totient is φ = 508800.

The previous prime is 1017721. The next prime is 1017749. The reversal of 1017728 is 8277101.

It is a tau number, because it is divible by the number of its divisors (16).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1017697 and 1017706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1017721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3848 + ... + 4103.

It is an arithmetic number, because the mean of its divisors is an integer number (126735).

2^1017728 is an apocalyptic number.

It is an amenable number.

1017728 is a deficient number, since it is larger than the sum of its proper divisors (1010032).

1017728 is an frugal number, since it uses more digits than its factorization.

1017728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7965 (or 7953 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 1017728 is about 1008.8250591654. The cubic root of 1017728 is about 100.5874753026.

The spelling of 1017728 in words is "one million, seventeen thousand, seven hundred twenty-eight".