195890590 has 16 divisors (see below), whose sum is σ = 402975072. Its totient is φ = 67162464.

The previous prime is 195890587. The next prime is 195890603. The reversal of 195890590 is 95098591.

It is a self number, because there is not a number n which added to its sum of digits gives 195890590.

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, 1399149 + ... + 1399288.

It is an arithmetic number, because the mean of its divisors is an integer number (25185942).

Almost surely, 2^195890590 is an apocalyptic number.

195890590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195890590 is an abundant number, since it is smaller than the sum of its proper divisors (207084482).

195890590 is a wasteful number, since it uses less digits than its factorization.

195890590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2798451.

The product of its (nonzero) digits is 145800, while the sum is 46.

The square root of 195890590 is about 13996.0919545422. The cubic root of 195890590 is about 580.7704683326.

The spelling of 195890590 in words is "one hundred ninety-five million, eight hundred ninety thousand, five hundred ninety".