193396644 has 72 divisors (see below), whose sum is σ = 565044480. Its totient is φ = 54628992.

The previous prime is 193396613. The next prime is 193396663. The reversal of 193396644 is 446693391.

193396644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 193396644.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18117 + ... + 26739.

It is an arithmetic number, because the mean of its divisors is an integer number (7847840).

Almost surely, 2^193396644 is an apocalyptic number.

193396644 is a gapful number since it is divisible by the number (14) 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 193396644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282522240).

193396644 is an abundant number, since it is smaller than the sum of its proper divisors (371647836).

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

193396644 is a wasteful number, since it uses less digits than its factorization.

193396644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8729 (or 8724 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 193396644 is about 13906.7121923192. The cubic root of 193396644 is about 578.2952758294.

The spelling of 193396644 in words is "one hundred ninety-three million, three hundred ninety-six thousand, six hundred forty-four".