195772864 has 28 divisors (see below), whose sum is σ = 443985904. Its totient is φ = 83902464.

The previous prime is 195772853. The next prime is 195772873. The reversal of 195772864 is 468277591.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218049 + ... + 218944.

Almost surely, 2^195772864 is an apocalyptic number.

195772864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

195772864 is an abundant number, since it is smaller than the sum of its proper divisors (248213040).

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

195772864 is an equidigital number, since it uses as much as digits as its factorization.

195772864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437012 (or 437002 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

The square root of 195772864 is about 13991.8856484750. The cubic root of 195772864 is about 580.6541015291.

The spelling of 195772864 in words is "one hundred ninety-five million, seven hundred seventy-two thousand, eight hundred sixty-four".