195957590 has 16 divisors (see below), whose sum is σ = 354268080. Its totient is φ = 78039840.

The previous prime is 195957577. The next prime is 195957607. The reversal of 195957590 is 95759591.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40496 + ... + 45075.

It is an arithmetic number, because the mean of its divisors is an integer number (22141755).

Almost surely, 2^195957590 is an apocalyptic number.

195957590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195957590 is a deficient number, since it is larger than the sum of its proper divisors (158310490).

195957590 is a wasteful number, since it uses less digits than its factorization.

195957590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85807.

The product of its (nonzero) digits is 637875, while the sum is 50.

The square root of 195957590 is about 13998.4852752003. The cubic root of 195957590 is about 580.8366739731.

The spelling of 195957590 in words is "one hundred ninety-five million, nine hundred fifty-seven thousand, five hundred ninety".