171116720 has 40 divisors (see below), whose sum is σ = 398620320. Its totient is φ = 68313600.

The previous prime is 171116689. The next prime is 171116731. The reversal of 171116720 is 27611171.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 171116720.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46301 + ... + 49859.

It is an arithmetic number, because the mean of its divisors is an integer number (9965508).

Almost surely, 2^171116720 is an apocalyptic number.

171116720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171116720 is an abundant number, since it is smaller than the sum of its proper divisors (227503600).

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

171116720 is a wasteful number, since it uses less digits than its factorization.

171116720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4173 (or 4167 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 26.

The square root of 171116720 is about 13081.1589700607. The cubic root of 171116720 is about 555.1761689478.

Adding to 171116720 its reverse (27611171), we get a palindrome (198727891).

The spelling of 171116720 in words is "one hundred seventy-one million, one hundred sixteen thousand, seven hundred twenty".