1163728 has 10 divisors (see below), whose sum is σ = 2254754. Its totient is φ = 581856.

The previous prime is 1163719. The next prime is 1163737. The reversal of 1163728 is 8273611.

It is an interprime number because it is at equal distance from previous prime (1163719) and next prime (1163737).

It can be written as a sum of positive squares in only one way, i.e., 1140624 + 23104 = 1068^2 + 152^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1163696 and 1163705.

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, 36351 + ... + 36382.

2^1163728 is an apocalyptic number.

It is an amenable number.

1163728 is a deficient number, since it is larger than the sum of its proper divisors (1091026).

1163728 is an equidigital number, since it uses as much as digits as its factorization.

1163728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72741 (or 72735 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 1163728 is about 1078.7622536963. The cubic root of 1163728 is about 105.1841967134.

It can be divided in two parts, 1163 and 728, that added together give a triangular number (1891 = T₆₁).

The spelling of 1163728 in words is "one million, one hundred sixty-three thousand, seven hundred twenty-eight".