198070278 has 16 divisors (see below), whose sum is σ = 452732160. Its totient is φ = 56591496.

The previous prime is 198070277. The next prime is 198070283. The reversal of 198070278 is 872070891.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 4715959 = 198070278 / (1 + 9 + 8 + 0 + 7 + 0 + 2 + 7 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198070277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2357938 + ... + 2358021.

It is an arithmetic number, because the mean of its divisors is an integer number (28295760).

Almost surely, 2^198070278 is an apocalyptic number.

198070278 is an abundant number, since it is smaller than the sum of its proper divisors (254661882).

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

198070278 is a wasteful number, since it uses less digits than its factorization.

198070278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4715971.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 198070278 is about 14073.7442779098. The cubic root of 198070278 is about 582.9166187008.

The spelling of 198070278 in words is "one hundred ninety-eight million, seventy thousand, two hundred seventy-eight".