198278774 has 8 divisors (see below), whose sum is σ = 299558280. Its totient is φ = 98426016.

The previous prime is 198278753. The next prime is 198278797. The reversal of 198278774 is 477872891.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356339 + ... + 356894.

It is an arithmetic number, because the mean of its divisors is an integer number (37444785).

Almost surely, 2^198278774 is an apocalyptic number.

198278774 is a deficient number, since it is larger than the sum of its proper divisors (101279506).

198278774 is a wasteful number, since it uses less digits than its factorization.

198278774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713374.

The product of its digits is 1580544, while the sum is 53.

The square root of 198278774 is about 14081.1495979554. The cubic root of 198278774 is about 583.1210800754.

The spelling of 198278774 in words is "one hundred ninety-eight million, two hundred seventy-eight thousand, seven hundred seventy-four".