171297380 has 48 divisors (see below), whose sum is σ = 369747840. Its totient is φ = 66624768.

The previous prime is 171297349. The next prime is 171297391. The reversal of 171297380 is 83792171.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351497 + ... + 351983.

It is an arithmetic number, because the mean of its divisors is an integer number (7703080).

Almost surely, 2^171297380 is an apocalyptic number.

171297380 is a gapful number since it is divisible by the number (10) 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 171297380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184873920).

171297380 is an abundant number, since it is smaller than the sum of its proper divisors (198450460).

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

171297380 is a wasteful number, since it uses less digits than its factorization.

171297380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 171297380 is about 13088.0624998508. The cubic root of 171297380 is about 555.3714797861.

The spelling of 171297380 in words is "one hundred seventy-one million, two hundred ninety-seven thousand, three hundred eighty".