191932220 has 48 divisors (see below), whose sum is σ = 418712448. Its totient is φ = 73846080.

The previous prime is 191932207. The next prime is 191932229. The reversal of 191932220 is 22239191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191932229) 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, 55955 + ... + 59285.

It is an arithmetic number, because the mean of its divisors is an integer number (8723176).

Almost surely, 2^191932220 is an apocalyptic number.

191932220 is a gapful number since it is divisible by the number (10) 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 191932220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209356224).

191932220 is an abundant number, since it is smaller than the sum of its proper divisors (226780228).

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

191932220 is a wasteful number, since it uses less digits than its factorization.

191932220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450 (or 3448 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 191932220 is about 13853.9604445805. The cubic root of 191932220 is about 576.8319342470.

The spelling of 191932220 in words is "one hundred ninety-one million, nine hundred thirty-two thousand, two hundred twenty".