195169890 has 16 divisors (see below), whose sum is σ = 468407808. Its totient is φ = 52045296.

The previous prime is 195169883. The next prime is 195169901. The reversal of 195169890 is 98961591.

It is a super-2 number, since 2×195169890² = 76182571925224200, which contains 22 as substring.

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, 3252802 + ... + 3252861.

It is an arithmetic number, because the mean of its divisors is an integer number (29275488).

Almost surely, 2^195169890 is an apocalyptic number.

195169890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195169890 is an abundant number, since it is smaller than the sum of its proper divisors (273237918).

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

195169890 is a wasteful number, since it uses less digits than its factorization.

195169890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6505673.

The product of its (nonzero) digits is 174960, while the sum is 48.

The square root of 195169890 is about 13970.3217572109. The cubic root of 195169890 is about 580.0573565949.

The spelling of 195169890 in words is "one hundred ninety-five million, one hundred sixty-nine thousand, eight hundred ninety".