1172728 has 16 divisors (see below), whose sum is σ = 2328480. Its totient is φ = 551808.

The previous prime is 1172713. The next prime is 1172749. The reversal of 1172728 is 8272711.

It is a d-powerful number, because it can be written as 1 + 1 + 7⁴ + 2² + 7⁶ + 2²⁰ + 8⁴ .

It is a junction number, because it is equal to n+sod(n) for n = 1172696 and 1172705.

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, 4176 + ... + 4447.

It is an arithmetic number, because the mean of its divisors is an integer number (145530).

2^1172728 is an apocalyptic number.

It is an amenable number.

1172728 is a deficient number, since it is larger than the sum of its proper divisors (1155752).

1172728 is a wasteful number, since it uses less digits than its factorization.

1172728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8646 (or 8642 counting only the distinct ones).

The product of its digits is 1568, while the sum is 28.

The square root of 1172728 is about 1082.9256668858. The cubic root of 1172728 is about 105.4546573342.

It can be divided in two parts, 11 and 72728, that multiplied together give a palindrome (800008).

The spelling of 1172728 in words is "one million, one hundred seventy-two thousand, seven hundred twenty-eight".