191922672 has 80 divisors (see below), whose sum is σ = 520109568. Its totient is φ = 60867840.

The previous prime is 191922641. The next prime is 191922677. The reversal of 191922672 is 276229191.

It is a self number, because there is not a number n which added to its sum of digits gives 191922672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191922677) 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, 290022 + ... + 290682.

Almost surely, 2^191922672 is an apocalyptic number.

191922672 is a gapful number since it is divisible by the number (12) 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 191922672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260054784).

191922672 is an abundant number, since it is smaller than the sum of its proper divisors (328186896).

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

191922672 is a wasteful number, since it uses less digits than its factorization.

191922672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 952 counting only the distinct ones).

The product of its digits is 27216, while the sum is 39.

The square root of 191922672 is about 13853.6158456917. The cubic root of 191922672 is about 576.8223689212.

The spelling of 191922672 in words is "one hundred ninety-one million, nine hundred twenty-two thousand, six hundred seventy-two".