172272198 has 32 divisors (see below), whose sum is σ = 396877824. Its totient is φ = 48831552.

The previous prime is 172272197. The next prime is 172272223. The reversal of 172272198 is 891272271.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172272193) by changing a digit.

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, 10815 + ... + 21482.

It is an arithmetic number, because the mean of its divisors is an integer number (12402432).

Almost surely, 2^172272198 is an apocalyptic number.

172272198 is an abundant number, since it is smaller than the sum of its proper divisors (224605626).

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

172272198 is a wasteful number, since it uses less digits than its factorization.

172272198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32436.

The product of its digits is 28224, while the sum is 39.

The square root of 172272198 is about 13125.2503976115. The cubic root of 172272198 is about 556.4229891117.

It can be divided in two parts, 1722 and 72198, that added together give a triangular number (73920 = T₃₈₄).

The spelling of 172272198 in words is "one hundred seventy-two million, two hundred seventy-two thousand, one hundred ninety-eight".