171853940 has 12 divisors (see below), whose sum is σ = 360893316. Its totient is φ = 68741568.

The previous prime is 171853939. The next prime is 171853943. The reversal of 171853940 is 49358171.

It can be written as a sum of positive squares in 2 ways, for example, as 135396496 + 36457444 = 11636^2 + 6038^2 .

It is a junction number, because it is equal to n+sod(n) for n = 171853894 and 171853903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171853943) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4296329 + ... + 4296368.

It is an arithmetic number, because the mean of its divisors is an integer number (30074443).

Almost surely, 2^171853940 is an apocalyptic number.

171853940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171853940 is an abundant number, since it is smaller than the sum of its proper divisors (189039376).

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

171853940 is a wasteful number, since it uses less digits than its factorization.

171853940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8592706 (or 8592704 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 171853940 is about 13109.3073806361. The cubic root of 171853940 is about 555.9723128562.

The spelling of 171853940 in words is "one hundred seventy-one million, eight hundred fifty-three thousand, nine hundred forty".