191141928 has 48 divisors (see below), whose sum is σ = 520603200. Its totient is φ = 63353760.

The previous prime is 191141927. The next prime is 191141971. The reversal of 191141928 is 829141191.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 191141892 and 191141901.

It is not an unprimeable number, because it can be changed into a prime (191141927) 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 11 ways as a sum of consecutive naturals, for example, 5473 + ... + 20303.

It is an arithmetic number, because the mean of its divisors is an integer number (10845900).

Almost surely, 2^191141928 is an apocalyptic number.

191141928 is a gapful number since it is divisible by the number (18) 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 191141928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260301600).

191141928 is an abundant number, since it is smaller than the sum of its proper divisors (329461272).

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

191141928 is a wasteful number, since it uses less digits than its factorization.

191141928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15022 (or 15015 counting only the distinct ones).

The product of its digits is 5184, while the sum is 36.

The square root of 191141928 is about 13825.4087823833. The cubic root of 191141928 is about 576.0391321793.

The spelling of 191141928 in words is "one hundred ninety-one million, one hundred forty-one thousand, nine hundred twenty-eight".