191145930 has 32 divisors (see below), whose sum is σ = 461683584. Its totient is φ = 50646336.

The previous prime is 191145883. The next prime is 191145937. The reversal of 191145930 is 39541191.

It is a junction number, because it is equal to n+sod(n) for n = 191145891 and 191145900.

It is not an unprimeable number, because it can be changed into a prime (191145937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15582 + ... + 25001.

It is an arithmetic number, because the mean of its divisors is an integer number (14427612).

Almost surely, 2^191145930 is an apocalyptic number.

191145930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191145930 is an abundant number, since it is smaller than the sum of its proper divisors (270537654).

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

191145930 is a wasteful number, since it uses less digits than its factorization.

191145930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40750.

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 191145930 is about 13825.5535151400. The cubic root of 191145930 is about 576.0431523901.

The spelling of 191145930 in words is "one hundred ninety-one million, one hundred forty-five thousand, nine hundred thirty".