191648808 has 128 divisors (see below), whose sum is σ = 578793600. Its totient is φ = 58406400.

The previous prime is 191648777. The next prime is 191648833. The reversal of 191648808 is 808846191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 367588 + ... + 368108.

It is an arithmetic number, because the mean of its divisors is an integer number (4521825).

Almost surely, 2^191648808 is an apocalyptic number.

191648808 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 191648808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289396800).

191648808 is an abundant number, since it is smaller than the sum of its proper divisors (387144792).

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

191648808 is a wasteful number, since it uses less digits than its factorization.

191648808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 191648808 is about 13843.7281105922. The cubic root of 191648808 is about 576.5478728129.

It can be divided in two parts, 19164 and 8808, that added together give a palindrome (27972).

The spelling of 191648808 in words is "one hundred ninety-one million, six hundred forty-eight thousand, eight hundred eight".