171365940 has 144 divisors (see below), whose sum is σ = 554299200. Its totient is φ = 42729984.

The previous prime is 171365917. The next prime is 171366043. The reversal of 171365940 is 49563171.

171365940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 171365895 and 171365904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 304099 + ... + 304661.

It is an arithmetic number, because the mean of its divisors is an integer number (3849300).

Almost surely, 2^171365940 is an apocalyptic number.

171365940 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 171365940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277149600).

171365940 is an abundant number, since it is smaller than the sum of its proper divisors (382933260).

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

171365940 is a wasteful number, since it uses less digits than its factorization.

171365940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 171365940 is about 13090.6814184747. The cubic root of 171365940 is about 555.4455637951.

The spelling of 171365940 in words is "one hundred seventy-one million, three hundred sixty-five thousand, nine hundred forty".