196181680 has 20 divisors (see below), whose sum is σ = 456122592. Its totient is φ = 78472640.

The previous prime is 196181663. The next prime is 196181701. The reversal of 196181680 is 86181691.

It is a tau number, because it is divible by the number of its divisors (20).

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

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, 1226056 + ... + 1226215.

Almost surely, 2^196181680 is an apocalyptic number.

196181680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196181680 is an abundant number, since it is smaller than the sum of its proper divisors (259940912).

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

196181680 is a wasteful number, since it uses less digits than its factorization.

196181680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452284 (or 2452278 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 196181680 is about 14006.4870684979. The cubic root of 196181680 is about 581.0579975539.

The spelling of 196181680 in words is "one hundred ninety-six million, one hundred eighty-one thousand, six hundred eighty".