194838220 has 12 divisors (see below), whose sum is σ = 409160304. Its totient is φ = 77935280.

The previous prime is 194838157. The next prime is 194838223. The reversal of 194838220 is 22838491.

It is a self number, because there is not a number n which added to its sum of digits gives 194838220.

It is not an unprimeable number, because it can be changed into a prime (194838223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4870936 + ... + 4870975.

It is an arithmetic number, because the mean of its divisors is an integer number (34096692).

Almost surely, 2^194838220 is an apocalyptic number.

194838220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194838220 is an abundant number, since it is smaller than the sum of its proper divisors (214322084).

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

194838220 is a wasteful number, since it uses less digits than its factorization.

194838220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9741920 (or 9741918 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 194838220 is about 13958.4461885985. The cubic root of 194838220 is about 579.7285888274.

The spelling of 194838220 in words is "one hundred ninety-four million, eight hundred thirty-eight thousand, two hundred twenty".