172028029 has 8 divisors (see below), whose sum is σ = 178268760. Its totient is φ = 165807936.

The previous prime is 172028027. The next prime is 172028039. The reversal of 172028029 is 920820271.

It can be written as a sum of positive squares in 4 ways, for example, as 3080025 + 168948004 = 1755^2 + 12998^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172028029 - 2¹ = 172028027 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172028027) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12939 + ... + 22615.

It is an arithmetic number, because the mean of its divisors is an integer number (22283595).

Almost surely, 2^172028029 is an apocalyptic number.

It is an amenable number.

172028029 is a deficient number, since it is larger than the sum of its proper divisors (6240731).

172028029 is an equidigital number, since it uses as much as digits as its factorization.

172028029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10319.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 172028029 is about 13115.9456006801. The cubic root of 172028029 is about 556.1599838515.

The spelling of 172028029 in words is "one hundred seventy-two million, twenty-eight thousand, twenty-nine".