1172788878 has 8 divisors (see below), whose sum is σ = 2345577768. Its totient is φ = 390929624.

The previous prime is 1172788861. The next prime is 1172788933. The reversal of 1172788878 is 8788872711.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1172788878 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 97732401 + ... + 97732412.

It is an arithmetic number, because the mean of its divisors is an integer number (293197221).

Almost surely, 2^1172788878 is an apocalyptic number.

1172788878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1172788878 is a wasteful number, since it uses less digits than its factorization.

1172788878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195464818.

The product of its digits is 2809856, while the sum is 57.

The square root of 1172788878 is about 34246.0052852884. The cubic root of 1172788878 is about 1054.5648207038.

The spelling of 1172788878 in words is "one billion, one hundred seventy-two million, seven hundred eighty-eight thousand, eight hundred seventy-eight".