196578 has 24 divisors (see below), whose sum is σ = 434928. Its totient is φ = 64152.

The previous prime is 196561. The next prime is 196579. The reversal of 196578 is 875691.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (196579) by changing a digit.

196578 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1125 + ... + 1287.

It is an arithmetic number, because the mean of its divisors is an integer number (18122).

2¹⁹⁶⁵⁷⁸ is an apocalyptic number.

196578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

196578 is an abundant number, since it is smaller than the sum of its proper divisors (238350).

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

196578 is a wasteful number, since it uses less digits than its factorization.

196578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 235 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 196578 is about 443.3711763297. The cubic root of 196578 is about 58.1449012671.

The spelling of 196578 in words is "one hundred ninety-six thousand, five hundred seventy-eight".