172028071 has 4 divisors (see below), whose sum is σ = 181082200. Its totient is φ = 162973944.

The previous prime is 172028069. The next prime is 172028093. The reversal of 172028071 is 170820271.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 172028071 - 2¹ = 172028069 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 (172028471) 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, 4527036 + ... + 4527073.

It is an arithmetic number, because the mean of its divisors is an integer number (45270550).

Almost surely, 2^172028071 is an apocalyptic number.

172028071 is a deficient number, since it is larger than the sum of its proper divisors (9054129).

172028071 is an equidigital number, since it uses as much as digits as its factorization.

172028071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9054128.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 172028071 is about 13115.9472017846. The cubic root of 172028071 is about 556.1600291129.

It can be divided in two parts, 1720 and 28071, that added together give a cube (29791 = 31³).

The spelling of 172028071 in words is "one hundred seventy-two million, twenty-eight thousand, seventy-one".