195009408 has 144 divisors (see below), whose sum is σ = 617253000. Its totient is φ = 59051520.

The previous prime is 195009383. The next prime is 195009449. The reversal of 195009408 is 804900591.

It is a tau number, because it is divible by the number of its divisors (144).

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 polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 138693 + ... + 140091.

Almost surely, 2^195009408 is an apocalyptic number.

195009408 is a gapful number since it is divisible by the number (18) 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 195009408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308626500).

195009408 is an abundant number, since it is smaller than the sum of its proper divisors (422243592).

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

195009408 is a wasteful number, since it uses less digits than its factorization.

195009408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441 (or 1415 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 195009408 is about 13964.5769001427. The cubic root of 195009408 is about 579.8983254196.

Adding to 195009408 its reverse (804900591), we get a palindrome (999909999).

The spelling of 195009408 in words is "one hundred ninety-five million, nine thousand, four hundred eight".