191020192 has 48 divisors (see below), whose sum is σ = 413586432. Its totient is φ = 86123520.

The previous prime is 191020163. The next prime is 191020201. The reversal of 191020192 is 291020191.

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 7 ways as a sum of consecutive naturals, for example, 42568 + ... + 46840.

It is an arithmetic number, because the mean of its divisors is an integer number (8616384).

Almost surely, 2^191020192 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 191020192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206793216).

191020192 is an abundant number, since it is smaller than the sum of its proper divisors (222566240).

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

191020192 is a wasteful number, since it uses less digits than its factorization.

191020192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4421 (or 4413 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 191020192 is about 13821.0054627006. The cubic root of 191020192 is about 575.9168154049.

Subtracting 191020192 from its reverse (291020191), we obtain a palindrome (99999999).

The spelling of 191020192 in words is "one hundred ninety-one million, twenty thousand, one hundred ninety-two".