190805706 has 180 divisors, whose sum is σ = 548352882. Its totient is φ = 49152096.

The previous prime is 190805701. The next prime is 190805731. The reversal of 190805706 is 607508091.

190805706 is a `hidden beast` number, since 1 + 9 + 0 + 80 + 570 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 183467025 + 7338681 = 13545^2 + 2709^2 .

It is not an unprimeable number, because it can be changed into a prime (190805701) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 4437321 + ... + 4437363.

Almost surely, 2^190805706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190805706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274176441).

190805706 is an abundant number, since it is smaller than the sum of its proper divisors (357547176).

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

190805706 is a wasteful number, since it uses less digits than its factorization.

190805706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 190805706 is about 13813.2438623229. The cubic root of 190805706 is about 575.7011796386.

The spelling of 190805706 in words is "one hundred ninety million, eight hundred five thousand, seven hundred six".