172205340 has 24 divisors (see below), whose sum is σ = 482175120. Its totient is φ = 45921408.

The previous prime is 172205323. The next prime is 172205351. The reversal of 172205340 is 43502271.

It is a super-3 number, since 3×172205340³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 172205340.

It is a congruent number.

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, 1434985 + ... + 1435104.

It is an arithmetic number, because the mean of its divisors is an integer number (20090630).

Almost surely, 2^172205340 is an apocalyptic number.

172205340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172205340 is an abundant number, since it is smaller than the sum of its proper divisors (309969780).

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

172205340 is a wasteful number, since it uses less digits than its factorization.

172205340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870101 (or 2870099 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 172205340 is about 13122.7032276128. The cubic root of 172205340 is about 556.3509981148.

The spelling of 172205340 in words is "one hundred seventy-two million, two hundred five thousand, three hundred forty".