195489720 has 128 divisors (see below), whose sum is σ = 672768000. Its totient is φ = 50440320.

The previous prime is 195489713. The next prime is 195489731. The reversal of 195489720 is 27984591.

195489720 is a `hidden beast` number, since 19 + 548 + 97 + 2 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30561 + ... + 36399.

It is an arithmetic number, because the mean of its divisors is an integer number (5256000).

Almost surely, 2^195489720 is an apocalyptic number.

195489720 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 195489720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336384000).

195489720 is an abundant number, since it is smaller than the sum of its proper divisors (477278280).

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

195489720 is a wasteful number, since it uses less digits than its factorization.

195489720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5890 (or 5880 counting only the distinct ones).

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

The square root of 195489720 is about 13981.7638372274. The cubic root of 195489720 is about 580.3740353918.

The spelling of 195489720 in words is "one hundred ninety-five million, four hundred eighty-nine thousand, seven hundred twenty".