1091158088 has 32 divisors (see below), whose sum is σ = 2203752960. Its totient is φ = 505021440.

The previous prime is 1091158043. The next prime is 1091158091. The reversal of 1091158088 is 8808511901.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89945 + ... + 101352.

It is an arithmetic number, because the mean of its divisors is an integer number (68867280).

Almost surely, 2^1091158088 is an apocalyptic number.

It is an amenable number.

1091158088 is an abundant number, since it is smaller than the sum of its proper divisors (1112594872).

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

1091158088 is a wasteful number, since it uses less digits than its factorization.

1091158088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191357 (or 191353 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 41.

The square root of 1091158088 is about 33032.6821193799. The cubic root of 1091158088 is about 1029.5068138786.

Adding to 1091158088 its reverse (8808511901), we get a palindrome (9899669989).

The spelling of 1091158088 in words is "one billion, ninety-one million, one hundred fifty-eight thousand, eighty-eight".