1158542728 has 16 divisors (see below), whose sum is σ = 2482591680. Its totient is φ = 496518288.

The previous prime is 1158542717. The next prime is 1158542731. The reversal of 1158542728 is 8272458511.

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, 10344076 + ... + 10344187.

It is an arithmetic number, because the mean of its divisors is an integer number (155161980).

Almost surely, 2^1158542728 is an apocalyptic number.

It is an amenable number.

1158542728 is an abundant number, since it is smaller than the sum of its proper divisors (1324048952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1158542728 is a wasteful number, since it uses less digits than its factorization.

1158542728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20688276 (or 20688272 counting only the distinct ones).

The product of its digits is 179200, while the sum is 43.

The square root of 1158542728 is about 34037.3725190415. The cubic root of 1158542728 is about 1050.2773954926.

The spelling of 1158542728 in words is "one billion, one hundred fifty-eight million, five hundred forty-two thousand, seven hundred twenty-eight".