1172431168 has 42 divisors (see below), whose sum is σ = 2377383866. Its totient is φ = 573673728.

The previous prime is 1172431159. The next prime is 1172431171. The reversal of 1172431168 is 8611342711.

It can be written as a sum of positive squares in only one way, i.e., 860131584 + 312299584 = 29328^2 + 17672^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 137230 + ... + 145522.

Almost surely, 2^1172431168 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 1172431168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1188691933).

1172431168 is an abundant number, since it is smaller than the sum of its proper divisors (1204952698).

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

1172431168 is an frugal number, since it uses more digits than its factorization.

1172431168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8399 (or 8342 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 1172431168 is about 34240.7822340553. The cubic root of 1172431168 is about 1054.4575928960.

Adding to 1172431168 its reverse (8611342711), we get a palindrome (9783773879).

The spelling of 1172431168 in words is "one billion, one hundred seventy-two million, four hundred thirty-one thousand, one hundred sixty-eight".