1189915056 has 80 divisors (see below), whose sum is σ = 3726011520. Its totient is φ = 360578880.

The previous prime is 1189915039. The next prime is 1189915061. The reversal of 1189915056 is 6505199811.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120450 + ... + 129953.

It is an arithmetic number, because the mean of its divisors is an integer number (46575144).

Almost surely, 2^1189915056 is an apocalyptic number.

1189915056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1189915056 is an abundant number, since it is smaller than the sum of its proper divisors (2536096464).

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

1189915056 is a wasteful number, since it uses less digits than its factorization.

1189915056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250431 (or 250419 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 45.

The square root of 1189915056 is about 34495.1453975773. The cubic root of 1189915056 is about 1059.6732872309.

The spelling of 1189915056 in words is "one billion, one hundred eighty-nine million, nine hundred fifteen thousand, fifty-six".