1158728 has 16 divisors (see below), whose sum is σ = 2185260. Its totient is φ = 576000.

The previous prime is 1158719. The next prime is 1158743. The reversal of 1158728 is 8278511.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1044484 + 114244 = 1022^2 + 338^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1158694 and 1158703.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1628 + ... + 2228.

2^1158728 is an apocalyptic number.

It is an amenable number.

1158728 is a deficient number, since it is larger than the sum of its proper divisors (1026532).

1158728 is a wasteful number, since it uses less digits than its factorization.

1158728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848 (or 844 counting only the distinct ones).

The product of its digits is 4480, while the sum is 32.

The square root of 1158728 is about 1076.4422882812. The cubic root of 1158728 is about 105.0333378645.

The spelling of 1158728 in words is "one million, one hundred fifty-eight thousand, seven hundred twenty-eight".