191338530 has 16 divisors (see below), whose sum is σ = 459212544. Its totient is φ = 51023600.

The previous prime is 191338523. The next prime is 191338547. The reversal of 191338530 is 35833191.

It is a super-2 number, since 2×191338530² = 73220866125121800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 191338491 and 191338500.

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, 3188946 + ... + 3189005.

It is an arithmetic number, because the mean of its divisors is an integer number (28700784).

Almost surely, 2^191338530 is an apocalyptic number.

191338530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191338530 is an abundant number, since it is smaller than the sum of its proper divisors (267874014).

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

191338530 is a wasteful number, since it uses less digits than its factorization.

191338530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6377961.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 191338530 is about 13832.5171245150. The cubic root of 191338530 is about 576.2365625048.

The spelling of 191338530 in words is "one hundred ninety-one million, three hundred thirty-eight thousand, five hundred thirty".