194168340 has 120 divisors (see below), whose sum is σ = 630269640. Its totient is φ = 49980672.

The previous prime is 194168269. The next prime is 194168347. The reversal of 194168340 is 43861491.

It can be written as a sum of positive squares in 4 ways, for example, as 38118276 + 156050064 = 6174^2 + 12492^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 194168295 and 194168304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194168347) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 44914 + ... + 49046.

It is an arithmetic number, because the mean of its divisors is an integer number (5252247).

Almost surely, 2^194168340 is an apocalyptic number.

194168340 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 194168340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315134820).

194168340 is an abundant number, since it is smaller than the sum of its proper divisors (436101300).

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

194168340 is a wasteful number, since it uses less digits than its factorization.

194168340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4183 (or 4172 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 194168340 is about 13934.4300206359. The cubic root of 194168340 is about 579.0634309954.

The spelling of 194168340 in words is "one hundred ninety-four million, one hundred sixty-eight thousand, three hundred forty".