195640992 has 36 divisors (see below), whose sum is σ = 556354890. Its totient is φ = 65213568.

The previous prime is 195640987. The next prime is 195641003. The reversal of 195640992 is 299046591.

195640992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 146023056 + 49617936 = 12084^2 + 7044^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 339367 + ... + 339942.

Almost surely, 2^195640992 is an apocalyptic number.

195640992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

195640992 is an abundant number, since it is smaller than the sum of its proper divisors (360713898).

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

195640992 is a wasteful number, since it uses less digits than its factorization.

195640992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679325 (or 679314 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 195640992 is about 13987.1724090325. The cubic root of 195640992 is about 580.5236966381.

The spelling of 195640992 in words is "one hundred ninety-five million, six hundred forty thousand, nine hundred ninety-two".