195135858 has 48 divisors (see below), whose sum is σ = 439052640. Its totient is φ = 64241856.

The previous prime is 195135827. The next prime is 195135859. The reversal of 195135858 is 858531591.

195135858 is a `hidden beast` number, since 19 + 51 + 3 + 585 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (195135859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 689385 + ... + 689667.

It is an arithmetic number, because the mean of its divisors is an integer number (9146930).

Almost surely, 2^195135858 is an apocalyptic number.

195135858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 195135858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219526320).

195135858 is an abundant number, since it is smaller than the sum of its proper divisors (243916782).

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

195135858 is a wasteful number, since it uses less digits than its factorization.

195135858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 401 counting only the distinct ones).

The product of its digits is 216000, while the sum is 45.

The square root of 195135858 is about 13969.1036935088. The cubic root of 195135858 is about 580.0236395438.

The spelling of 195135858 in words is "one hundred ninety-five million, one hundred thirty-five thousand, eight hundred fifty-eight".