195189750 has 288 divisors, whose sum is σ = 663204672. Its totient is φ = 41990400.

The previous prime is 195189739. The next prime is 195189769. The reversal of 195189750 is 57981591.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 195189696 and 195189705.

It is a congruent number.

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 143 ways as a sum of consecutive naturals, for example, 11481742 + ... + 11481758.

It is an arithmetic number, because the mean of its divisors is an integer number (2302794).

Almost surely, 2^195189750 is an apocalyptic number.

195189750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 195189750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331602336).

195189750 is an abundant number, since it is smaller than the sum of its proper divisors (468014922).

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

195189750 is an frugal number, since it uses more digits than its factorization.

195189750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 45.

The square root of 195189750 is about 13971.0325316349. The cubic root of 195189750 is about 580.0770309897.

The spelling of 195189750 in words is "one hundred ninety-five million, one hundred eighty-nine thousand, seven hundred fifty".