190668816 has 100 divisors (see below), whose sum is σ = 594353452. Its totient is φ = 58662144.

The previous prime is 190668811. The next prime is 190668853. The reversal of 190668816 is 618866091.

It is a happy number.

190668816 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 116640000 + 74028816 = 10800^2 + 8604^2 .

It is not an unprimeable number, because it can be changed into a prime (190668811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11190 + ... + 22506.

Almost surely, 2^190668816 is an apocalyptic number.

190668816 is a gapful number since it is divisible by the number (16) 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 190668816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297176726).

190668816 is an abundant number, since it is smaller than the sum of its proper divisors (403684636).

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

190668816 is a wasteful number, since it uses less digits than its factorization.

190668816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11350 (or 11335 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 190668816 is about 13808.2879460127. The cubic root of 190668816 is about 575.5634713383.

The spelling of 190668816 in words is "one hundred ninety million, six hundred sixty-eight thousand, eight hundred sixteen".