171241728 has 144 divisors (see below), whose sum is σ = 531570816. Its totient is φ = 47923200.

The previous prime is 171241703. The next prime is 171241753. The reversal of 171241728 is 827142171.

It is an interprime number because it is at equal distance from previous prime (171241703) and next prime (171241753).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284628 + ... + 285228.

It is an arithmetic number, because the mean of its divisors is an integer number (3691464).

Almost surely, 2^171241728 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 171241728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265785408).

171241728 is an abundant number, since it is smaller than the sum of its proper divisors (360329088).

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

171241728 is an equidigital number, since it uses as much as digits as its factorization.

171241728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 666 counting only the distinct ones).

The product of its digits is 6272, while the sum is 33.

The square root of 171241728 is about 13085.9362676119. The cubic root of 171241728 is about 555.3113292624.

Adding to 171241728 its reverse (827142171), we get a palindrome (998383899).

The spelling of 171241728 in words is "one hundred seventy-one million, two hundred forty-one thousand, seven hundred twenty-eight".