172665460 has 48 divisors (see below), whose sum is σ = 398160000. Its totient is φ = 62375040.

The previous prime is 172665431. The next prime is 172665487. The reversal of 172665460 is 64566271.

It is a happy number.

It is a super-2 number, since 2×172665460² = 59626722154023200, which contains 22 as substring.

It is a congruent number.

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, 32041 + ... + 37039.

It is an arithmetic number, because the mean of its divisors is an integer number (8295000).

Almost surely, 2^172665460 is an apocalyptic number.

172665460 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 172665460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199080000).

172665460 is an abundant number, since it is smaller than the sum of its proper divisors (225494540).

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

172665460 is a wasteful number, since it uses less digits than its factorization.

172665460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5176 (or 5174 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 172665460 is about 13140.2229813653. Note that the first 3 decimals coincide. The cubic root of 172665460 is about 556.8460670931.

The spelling of 172665460 in words is "one hundred seventy-two million, six hundred sixty-five thousand, four hundred sixty".