196290978 has 32 divisors (see below), whose sum is σ = 423360000. Its totient is φ = 60314496.

The previous prime is 196290971. The next prime is 196291003. The reversal of 196290978 is 879092691.

It is a happy number.

196290978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 196290978.

It is not an unprimeable number, because it can be changed into a prime (196290971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80623 + ... + 83021.

It is an arithmetic number, because the mean of its divisors is an integer number (13230000).

Almost surely, 2^196290978 is an apocalyptic number.

196290978 is an abundant number, since it is smaller than the sum of its proper divisors (227069022).

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

196290978 is a wasteful number, since it uses less digits than its factorization.

196290978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466.

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 196290978 is about 14010.3882173193. The cubic root of 196290978 is about 581.1658851109.

The spelling of 196290978 in words is "one hundred ninety-six million, two hundred ninety thousand, nine hundred seventy-eight".