172828447 has 16 divisors (see below), whose sum is σ = 193300992. Its totient is φ = 153176320.

The previous prime is 172828423. The next prime is 172828471. The reversal of 172828447 is 744828271.

It is an interprime number because it is at equal distance from previous prime (172828423) and next prime (172828471).

It is not a de Polignac number, because 172828447 - 2⁷ = 172828319 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 (172826447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182028 + ... + 182974.

It is an arithmetic number, because the mean of its divisors is an integer number (12081312).

Almost surely, 2^172828447 is an apocalyptic number.

172828447 is a deficient number, since it is larger than the sum of its proper divisors (20472545).

172828447 is a wasteful number, since it uses less digits than its factorization.

172828447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358.

The product of its digits is 200704, while the sum is 43.

The square root of 172828447 is about 13146.4233539012. The cubic root of 172828447 is about 557.0212230040.

The spelling of 172828447 in words is "one hundred seventy-two million, eight hundred twenty-eight thousand, four hundred forty-seven".