1171324728 has 96 divisors (see below), whose sum is σ = 3666405600. Its totient is φ = 330891264.

The previous prime is 1171324727. The next prime is 1171324729. The reversal of 1171324728 is 8274231711.

It is an interprime number because it is at equal distance from previous prime (1171324727) and next prime (1171324729).

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1171324692 and 1171324701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171324727) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 31800 + ... + 57912.

It is an arithmetic number, because the mean of its divisors is an integer number (38191725).

Almost surely, 2^1171324728 is an apocalyptic number.

1171324728 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 1171324728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1833202800).

1171324728 is an abundant number, since it is smaller than the sum of its proper divisors (2495080872).

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

1171324728 is a wasteful number, since it uses less digits than its factorization.

1171324728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26221 (or 26214 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 1171324728 is about 34224.6216633581. The cubic root of 1171324728 is about 1054.1257862785.

The spelling of 1171324728 in words is "one billion, one hundred seventy-one million, three hundred twenty-four thousand, seven hundred twenty-eight".