1172120688 has 120 divisors (see below), whose sum is σ = 3341192400. Its totient is φ = 383523840.

The previous prime is 1172120683. The next prime is 1172120689. The reversal of 1172120688 is 8860212711.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172120683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3358338 + ... + 3358686.

It is an arithmetic number, because the mean of its divisors is an integer number (27843270).

Almost surely, 2^1172120688 is an apocalyptic number.

1172120688 is a gapful number since it is divisible by the number (18) 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 1172120688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1670596200).

1172120688 is an abundant number, since it is smaller than the sum of its proper divisors (2169071712).

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

1172120688 is a wasteful number, since it uses less digits than its factorization.

1172120688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 1172120688 is about 34236.2481589324. The cubic root of 1172120688 is about 1054.3645051578.

The spelling of 1172120688 in words is "one billion, one hundred seventy-two million, one hundred twenty thousand, six hundred eighty-eight".