191079648 has 84 divisors (see below), whose sum is σ = 564092928. Its totient is φ = 63685440.

The previous prime is 191079641. The next prime is 191079683. The reversal of 191079648 is 846970191.

It is a happy number.

It is a super-2 number, since 2×191079648² = 73022863759607808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191079641) by changing a digit.

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 13 ways as a sum of consecutive naturals, for example, 19233 + ... + 27423.

It is an arithmetic number, because the mean of its divisors is an integer number (6715392).

Almost surely, 2^191079648 is an apocalyptic number.

191079648 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 191079648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282046464).

191079648 is an abundant number, since it is smaller than the sum of its proper divisors (373013280).

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

191079648 is an frugal number, since it uses more digits than its factorization.

191079648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8219 (or 8196 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 191079648 is about 13823.1562242492. The cubic root of 191079648 is about 575.9765615463.

The spelling of 191079648 in words is "one hundred ninety-one million, seventy-nine thousand, six hundred forty-eight".