191358648 has 48 divisors (see below), whose sum is σ = 558132120. Its totient is φ = 58879296.

The previous prime is 191358641. The next prime is 191358649. The reversal of 191358648 is 846853191.

191358648 is a `hidden beast` number, since 19 + 13 + 586 + 48 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191358641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101286 + ... + 103157.

Almost surely, 2^191358648 is an apocalyptic number.

191358648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

191358648 is an abundant number, since it is smaller than the sum of its proper divisors (366773472).

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

191358648 is a wasteful number, since it uses less digits than its factorization.

191358648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204468 (or 204461 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 191358648 is about 13833.2443049344. The cubic root of 191358648 is about 576.2567576372.

The spelling of 191358648 in words is "one hundred ninety-one million, three hundred fifty-eight thousand, six hundred forty-eight".