195427980 has 144 divisors (see below), whose sum is σ = 654544800. Its totient is φ = 46801920.

The previous prime is 195427979. The next prime is 195427993. The reversal of 195427980 is 89724591.

195427980 is a `hidden beast` number, since 19 + 542 + 7 + 98 + 0 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 47 ways as a sum of consecutive naturals, for example, 175666 + ... + 176774.

It is an arithmetic number, because the mean of its divisors is an integer number (4545450).

Almost surely, 2^195427980 is an apocalyptic number.

195427980 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 195427980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327272400).

195427980 is an abundant number, since it is smaller than the sum of its proper divisors (459116820).

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

195427980 is a wasteful number, since it uses less digits than its factorization.

195427980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224 (or 1219 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 195427980 is about 13979.5557869340. Note that the first 3 decimals coincide. The cubic root of 195427980 is about 580.3129306172.

The spelling of 195427980 in words is "one hundred ninety-five million, four hundred twenty-seven thousand, nine hundred eighty".