172441720 has 64 divisors (see below), whose sum is σ = 445564800. Its totient is φ = 59402880.

The previous prime is 172441697. The next prime is 172441733. The reversal of 172441720 is 27144271.

It is a super-2 number, since 2×172441720² = 59472293593116800, 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1954 + ... + 18673.

It is an arithmetic number, because the mean of its divisors is an integer number (6961950).

Almost surely, 2^172441720 is an apocalyptic number.

172441720 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 172441720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222782400).

172441720 is an abundant number, since it is smaller than the sum of its proper divisors (273123080).

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

172441720 is a wasteful number, since it uses less digits than its factorization.

172441720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20668 (or 20664 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 172441720 is about 13131.7066674519. The cubic root of 172441720 is about 556.6054426473.

Adding to 172441720 its reverse (27144271), we get a palindrome (199585991).

The spelling of 172441720 in words is "one hundred seventy-two million, four hundred forty-one thousand, seven hundred twenty".