172085860 has 12 divisors (see below), whose sum is σ = 361380348. Its totient is φ = 68834336.

The previous prime is 172085827. The next prime is 172085863. The reversal of 172085860 is 68580271.

It can be written as a sum of positive squares in 2 ways, for example, as 52533504 + 119552356 = 7248^2 + 10934^2 .

It is a super-2 number, since 2×172085860² = 59227086423879200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172085863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4302127 + ... + 4302166.

It is an arithmetic number, because the mean of its divisors is an integer number (30115029).

Almost surely, 2^172085860 is an apocalyptic number.

172085860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172085860 is an abundant number, since it is smaller than the sum of its proper divisors (189294488).

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

172085860 is a wasteful number, since it uses less digits than its factorization.

172085860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8604302 (or 8604300 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 172085860 is about 13118.1500220115. The cubic root of 172085860 is about 556.2222986668. Note that the first 4 decimals are identical.

The spelling of 172085860 in words is "one hundred seventy-two million, eighty-five thousand, eight hundred sixty".