1178801856 has 112 divisors (see below), whose sum is σ = 3507638400. Its totient is φ = 388152576.

The previous prime is 1178801851. The next prime is 1178801863. The reversal of 1178801856 is 6581088711.

It is not an unprimeable number, because it can be changed into a prime (1178801851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139315 + ... + 147533.

It is an arithmetic number, because the mean of its divisors is an integer number (31318200).

Almost surely, 2^1178801856 is an apocalyptic number.

1178801856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1178801856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1753819200).

1178801856 is an abundant number, since it is smaller than the sum of its proper divisors (2328836544).

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

1178801856 is an equidigital number, since it uses as much as digits as its factorization.

1178801856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8323 (or 8307 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 45.

The square root of 1178801856 is about 34333.6839852644. The cubic root of 1178801856 is about 1056.3640273896.

The spelling of 1178801856 in words is "one billion, one hundred seventy-eight million, eight hundred one thousand, eight hundred fifty-six".