196533978 has 16 divisors (see below), whose sum is σ = 401431680. Its totient is φ = 64117376.

The previous prime is 196533971. The next prime is 196533979. The reversal of 196533978 is 879335691.

It is a super-3 number, since 3×196533978³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 196533978.

It is not an unprimeable number, because it can be changed into a prime (196533971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348183 + ... + 348746.

It is an arithmetic number, because the mean of its divisors is an integer number (25089480).

Almost surely, 2^196533978 is an apocalyptic number.

196533978 is an abundant number, since it is smaller than the sum of its proper divisors (204897702).

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

196533978 is a wasteful number, since it uses less digits than its factorization.

196533978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696981.

The product of its digits is 1224720, while the sum is 51.

The square root of 196533978 is about 14019.0576716126. The cubic root of 196533978 is about 581.4056058822.

The spelling of 196533978 in words is "one hundred ninety-six million, five hundred thirty-three thousand, nine hundred seventy-eight".