197798378 has 8 divisors (see below), whose sum is σ = 296861760. Its totient is φ = 98844460.

The previous prime is 197798371. The next prime is 197798407. The reversal of 197798378 is 873897791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (197798371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22688 + ... + 30171.

It is an arithmetic number, because the mean of its divisors is an integer number (37107720).

Almost surely, 2^197798378 is an apocalyptic number.

197798378 is a deficient number, since it is larger than the sum of its proper divisors (99063382).

197798378 is a wasteful number, since it uses less digits than its factorization.

197798378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54732.

The product of its digits is 5334336, while the sum is 59.

The square root of 197798378 is about 14064.0811288900. The cubic root of 197798378 is about 582.6497645821.

The spelling of 197798378 in words is "one hundred ninety-seven million, seven hundred ninety-eight thousand, three hundred seventy-eight".