172030720 has 36 divisors (see below), whose sum is σ = 412070400. Its totient is φ = 68811776.

The previous prime is 172030673. The next prime is 172030721. The reversal of 172030720 is 27030271.

172030720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 172030691 and 172030700.

It is not an unprimeable number, because it can be changed into a prime (172030721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65920 + ... + 68479.

It is an arithmetic number, because the mean of its divisors is an integer number (11446400).

Almost surely, 2^172030720 is an apocalyptic number.

172030720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172030720 is an abundant number, since it is smaller than the sum of its proper divisors (240039680).

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

172030720 is an equidigital number, since it uses as much as digits as its factorization.

172030720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134420 (or 134406 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 172030720 is about 13116.0481853339. The cubic root of 172030720 is about 556.1628838028.

Adding to 172030720 its reverse (27030271), we get a palindrome (199060991).

The spelling of 172030720 in words is "one hundred seventy-two million, thirty thousand, seven hundred twenty".