196145978 has 16 divisors (see below), whose sum is σ = 350870400. Its totient is φ = 80407536.

The previous prime is 196145953. The next prime is 196145981. The reversal of 196145978 is 879541691.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304253 + ... + 304896.

It is an arithmetic number, because the mean of its divisors is an integer number (21929400).

Almost surely, 2^196145978 is an apocalyptic number.

196145978 is a deficient number, since it is larger than the sum of its proper divisors (154724422).

196145978 is a wasteful number, since it uses less digits than its factorization.

196145978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609181.

The product of its digits is 544320, while the sum is 50.

The square root of 196145978 is about 14005.2125296262. The cubic root of 196145978 is about 581.0227475904.

The spelling of 196145978 in words is "one hundred ninety-six million, one hundred forty-five thousand, nine hundred seventy-eight".