196809520 has 40 divisors (see below), whose sum is σ = 459251856. Its totient is φ = 78436608.

The previous prime is 196809499. The next prime is 196809521. The reversal of 196809520 is 25908691.

196809520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (196809521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18294 + ... + 26986.

Almost surely, 2^196809520 is an apocalyptic number.

196809520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196809520 is an abundant number, since it is smaller than the sum of its proper divisors (262442336).

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

196809520 is a wasteful number, since it uses less digits than its factorization.

196809520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8989 (or 8983 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 196809520 is about 14028.8816375362. The cubic root of 196809520 is about 581.6771905643.

The spelling of 196809520 in words is "one hundred ninety-six million, eight hundred nine thousand, five hundred twenty".