1172109888 has 42 divisors (see below), whose sum is σ = 3359643014. Its totient is φ = 390703104.

The previous prime is 1172109881. The next prime is 1172109899. The reversal of 1172109888 is 8889012711.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1054430784 + 117679104 = 32472^2 + 10848^2 .

It is not an unprimeable number, because it can be changed into a prime (1172109881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1016881 + ... + 1018032.

Almost surely, 2^1172109888 is an apocalyptic number.

1172109888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1172109888 is an abundant number, since it is smaller than the sum of its proper divisors (2187533126).

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

1172109888 is a wasteful number, since it uses less digits than its factorization.

1172109888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034931 (or 2034918 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 45.

The square root of 1172109888 is about 34236.0904310057. The cubic root of 1172109888 is about 1054.3612668190.

The spelling of 1172109888 in words is "one billion, one hundred seventy-two million, one hundred nine thousand, eight hundred eighty-eight".