172770198 has 16 divisors (see below), whose sum is σ = 345821616. Its totient is φ = 57543200.

The previous prime is 172770149. The next prime is 172770217. The reversal of 172770198 is 891077271.

It is a super-3 number, since 3×172770198³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3261 + ... + 18872.

It is an arithmetic number, because the mean of its divisors is an integer number (21613851).

Almost surely, 2^172770198 is an apocalyptic number.

172770198 is an abundant number, since it is smaller than the sum of its proper divisors (173051418).

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

172770198 is a wasteful number, since it uses less digits than its factorization.

172770198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23439.

The product of its (nonzero) digits is 49392, while the sum is 42.

The square root of 172770198 is about 13144.2077737686. The cubic root of 172770198 is about 556.9586376762.

The spelling of 172770198 in words is "one hundred seventy-two million, seven hundred seventy thousand, one hundred ninety-eight".