195039900 has 270 divisors, whose sum is σ = 698436200. Its totient is φ = 47044800.

The previous prime is 195039857. The next prime is 195039919. The reversal of 195039900 is 9930591.

It is a tau number, because it is divible by the number of its divisors (270).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 980001 + ... + 980199.

Almost surely, 2^195039900 is an apocalyptic number.

195039900 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 195039900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349218100).

195039900 is an abundant number, since it is smaller than the sum of its proper divisors (503396300).

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

195039900 is a wasteful number, since it uses less digits than its factorization.

195039900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 10935, while the sum is 36.

The square root of 195039900 is about 13965.6686198692. The cubic root of 195039900 is about 579.9285484712.

It can be divided in two parts, 19503 and 9900, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 195039900 in words is "one hundred ninety-five million, thirty-nine thousand, nine hundred".