194291980 has 48 divisors (see below), whose sum is σ = 433278720. Its totient is φ = 72931328.

The previous prime is 194291959. The next prime is 194291987. The reversal of 194291980 is 89192491.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (194291987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162264 + ... + 163456.

It is an arithmetic number, because the mean of its divisors is an integer number (9026640).

Almost surely, 2^194291980 is an apocalyptic number.

194291980 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 194291980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216639360).

194291980 is an abundant number, since it is smaller than the sum of its proper divisors (238986740).

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

194291980 is a wasteful number, since it uses less digits than its factorization.

194291980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698 (or 1696 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 194291980 is about 13938.8658075182. The cubic root of 194291980 is about 579.1863144195.

The spelling of 194291980 in words is "one hundred ninety-four million, two hundred ninety-one thousand, nine hundred eighty".