190871920 has 80 divisors (see below), whose sum is σ = 472469760. Its totient is φ = 71462912.

The previous prime is 190871911. The next prime is 190871951. The reversal of 190871920 is 29178091.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 190871920.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398241 + ... + 398719.

It is an arithmetic number, because the mean of its divisors is an integer number (5905872).

Almost surely, 2^190871920 is an apocalyptic number.

190871920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190871920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236234880).

190871920 is an abundant number, since it is smaller than the sum of its proper divisors (281597840).

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

190871920 is a wasteful number, since it uses less digits than its factorization.

190871920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 190871920 is about 13815.6404122285. The cubic root of 190871920 is about 575.7677658187.

The spelling of 190871920 in words is "one hundred ninety million, eight hundred seventy-one thousand, nine hundred twenty".