191950668 has 96 divisors (see below), whose sum is σ = 612523520. Its totient is φ = 50621760.

The previous prime is 191950657. The next prime is 191950741. The reversal of 191950668 is 866059191.

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, 63 + ... + 19593.

Almost surely, 2^191950668 is an apocalyptic number.

191950668 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 191950668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306261760).

191950668 is an abundant number, since it is smaller than the sum of its proper divisors (420572852).

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

191950668 is a wasteful number, since it uses less digits than its factorization.

191950668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19564 (or 19556 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 191950668 is about 13854.6262309743. The cubic root of 191950668 is about 576.8504148241.

The spelling of 191950668 in words is "one hundred ninety-one million, nine hundred fifty thousand, six hundred sixty-eight".