198296978 has 12 divisors (see below), whose sum is σ = 326944590. Its totient is φ = 90134880.

The previous prime is 198296971. The next prime is 198296999. The reversal of 198296978 is 879692891.

198296978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 120275089 + 78021889 = 10967^2 + 8833^2 .

It is a super-3 number, since 3×198296978³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (198296971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 409463 + ... + 409946.

Almost surely, 2^198296978 is an apocalyptic number.

198296978 is a deficient number, since it is larger than the sum of its proper divisors (128647612).

198296978 is a wasteful number, since it uses less digits than its factorization.

198296978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819433 (or 819422 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 59.

The square root of 198296978 is about 14081.7959792066. The cubic root of 198296978 is about 583.1389250033.

The spelling of 198296978 in words is "one hundred ninety-eight million, two hundred ninety-six thousand, nine hundred seventy-eight".