190866172 has 72 divisors (see below), whose sum is σ = 413683200. Its totient is φ = 76610016.

The previous prime is 190866149. The next prime is 190866187. The reversal of 190866172 is 271668091.

190866172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×190866172² = 72859791227867168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 398229 + ... + 398707.

It is an arithmetic number, because the mean of its divisors is an integer number (5745600).

Almost surely, 2^190866172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190866172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206841600).

190866172 is an abundant number, since it is smaller than the sum of its proper divisors (222817028).

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

190866172 is a wasteful number, since it uses less digits than its factorization.

190866172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 190866172 is about 13815.4323855607. The cubic root of 190866172 is about 575.7619861204.

The spelling of 190866172 in words is "one hundred ninety million, eight hundred sixty-six thousand, one hundred seventy-two".