1173320856 has 64 divisors (see below), whose sum is σ = 3269270400. Its totient is φ = 389901600.

The previous prime is 1173320849. The next prime is 1173320867. The reversal of 1173320856 is 6580233711.

It is a super-2 number, since 2×1173320856² = 2753363662249145472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1173320856.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 63291 + ... + 79701.

It is an arithmetic number, because the mean of its divisors is an integer number (51082350).

Almost surely, 2^1173320856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1173320856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1634635200).

1173320856 is an abundant number, since it is smaller than the sum of its proper divisors (2095949544).

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

1173320856 is a wasteful number, since it uses less digits than its factorization.

1173320856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16757 (or 16747 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1173320856 is about 34253.7714127948. The cubic root of 1173320856 is about 1054.7242470910.

The spelling of 1173320856 in words is "one billion, one hundred seventy-three million, three hundred twenty thousand, eight hundred fifty-six".