191668672 has 56 divisors (see below), whose sum is σ = 413619696. Its totient is φ = 87595008.

The previous prime is 191668669. The next prime is 191668681. The reversal of 191668672 is 276866191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87948 + ... + 90100.

It is an arithmetic number, because the mean of its divisors is an integer number (7386066).

Almost surely, 2^191668672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191668672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206809848).

191668672 is an abundant number, since it is smaller than the sum of its proper divisors (221951024).

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

191668672 is a wasteful number, since it uses less digits than its factorization.

191668672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285 (or 2275 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 191668672 is about 13844.4455288032. The cubic root of 191668672 is about 576.5677914537.

The spelling of 191668672 in words is "one hundred ninety-one million, six hundred sixty-eight thousand, six hundred seventy-two".