1166139528 has 16 divisors (see below), whose sum is σ = 2915348880. Its totient is φ = 388713168.

The previous prime is 1166139521. The next prime is 1166139553. The reversal of 1166139528 is 8259316611.

It is a self number, because there is not a number n which added to its sum of digits gives 1166139528.

It is not an unprimeable number, because it can be changed into a prime (1166139521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24294550 + ... + 24294597.

It is an arithmetic number, because the mean of its divisors is an integer number (182209305).

Almost surely, 2^1166139528 is an apocalyptic number.

It is an amenable number.

1166139528 is an abundant number, since it is smaller than the sum of its proper divisors (1749209352).

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

1166139528 is a wasteful number, since it uses less digits than its factorization.

1166139528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48589156 (or 48589152 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 1166139528 is about 34148.7851614080. The cubic root of 1166139528 is about 1052.5680234677.

The spelling of 1166139528 in words is "one billion, one hundred sixty-six million, one hundred thirty-nine thousand, five hundred twenty-eight".