1180857156 has 12 divisors (see below), whose sum is σ = 2755333392. Its totient is φ = 393619048.

The previous prime is 1180857151. The next prime is 1180857229. The reversal of 1180857156 is 6517580811.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1180857151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49202370 + ... + 49202393.

It is an arithmetic number, because the mean of its divisors is an integer number (229611116).

Almost surely, 2^1180857156 is an apocalyptic number.

It is an amenable number.

1180857156 is an abundant number, since it is smaller than the sum of its proper divisors (1574476236).

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

1180857156 is a wasteful number, since it uses less digits than its factorization.

1180857156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98404770 (or 98404768 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 42.

The square root of 1180857156 is about 34363.6021976742. The cubic root of 1180857156 is about 1056.9776120962.

The spelling of 1180857156 in words is "one billion, one hundred eighty million, eight hundred fifty-seven thousand, one hundred fifty-six".