195000000 has 224 divisors, whose sum is σ = 694529472. Its totient is φ = 48000000.

The previous prime is 194999989. The next prime is 195000023. The reversal of 195000000 is 591.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 14999994 + ... + 15000006.

It is an arithmetic number, because the mean of its divisors is an integer number (3100578).

Almost surely, 2^195000000 is an apocalyptic number.

195000000 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 195000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347264736).

195000000 is an abundant number, since it is smaller than the sum of its proper divisors (499529472).

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

195000000 is an frugal number, since it uses more digits than its factorization.

195000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 45, while the sum is 15.

The square root of 195000000 is about 13964.2400437689. The cubic root of 195000000 is about 579.8889997649. Note that the first 3 decimals are identical.

Adding to 195000000 its reverse (591), we get a palindrome (195000591).

The spelling of 195000000 in words is "one hundred ninety-five million", and thus it is an aban number.