1172889036 has 54 divisors (see below), whose sum is σ = 3236210796. Its totient is φ = 355214400.

The previous prime is 1172889017. The next prime is 1172889077. The reversal of 1172889036 is 6309882711.

It is a junction number, because it is equal to n+sod(n) for n = 1172888982 and 1172889000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 680656 + ... + 682376.

Almost surely, 2^1172889036 is an apocalyptic number.

It is an amenable number.

1172889036 is an abundant number, since it is smaller than the sum of its proper divisors (2063321760).

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

1172889036 is a wasteful number, since it uses less digits than its factorization.

1172889036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463 (or 1737 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1172889036 is about 34247.4675852099. The cubic root of 1172889036 is about 1054.5948403429.

The spelling of 1172889036 in words is "one billion, one hundred seventy-two million, eight hundred eighty-nine thousand, thirty-six".