190881306 has 128 divisors (see below), whose sum is σ = 547430400. Its totient is φ = 47839680.

The previous prime is 190881269. The next prime is 190881323. The reversal of 190881306 is 603188091.

190881306 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 119791 + ... + 121373.

It is an arithmetic number, because the mean of its divisors is an integer number (4276800).

Almost surely, 2^190881306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190881306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273715200).

190881306 is an abundant number, since it is smaller than the sum of its proper divisors (356549094).

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

190881306 is a wasteful number, since it uses less digits than its factorization.

190881306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641 (or 1635 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 190881306 is about 13815.9800955271. The cubic root of 190881306 is about 575.7772033299. Note that the first 3 decimals are identical.

The spelling of 190881306 in words is "one hundred ninety million, eight hundred eighty-one thousand, three hundred six".