191945208 has 64 divisors (see below), whose sum is σ = 590607360. Its totient is φ = 50622336.

The previous prime is 191945203. The next prime is 191945209. The reversal of 191945208 is 802549191.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191945203) 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, 41760 + ... + 46127.

It is an arithmetic number, because the mean of its divisors is an integer number (9228240).

Almost surely, 2^191945208 is an apocalyptic number.

It is an amenable number.

191945208 is an abundant number, since it is smaller than the sum of its proper divisors (398662152).

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

191945208 is a wasteful number, since it uses less digits than its factorization.

191945208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87916 (or 87912 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 191945208 is about 13854.4291834778. The cubic root of 191945208 is about 576.8449453058.

The spelling of 191945208 in words is "one hundred ninety-one million, nine hundred forty-five thousand, two hundred eight".