198078340 has 24 divisors (see below), whose sum is σ = 423017280. Its totient is φ = 77887968.

The previous prime is 198078337. The next prime is 198078347. The reversal of 198078340 is 43870891.

It is a junction number, because it is equal to n+sod(n) for n = 198078293 and 198078302.

It is not an unprimeable number, because it can be changed into a prime (198078347) 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, 82752 + ... + 85111.

It is an arithmetic number, because the mean of its divisors is an integer number (17625720).

Almost surely, 2^198078340 is an apocalyptic number.

198078340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198078340 is an abundant number, since it is smaller than the sum of its proper divisors (224938940).

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

198078340 is a wasteful number, since it uses less digits than its factorization.

198078340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167931 (or 167929 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 198078340 is about 14074.0306948649. The cubic root of 198078340 is about 582.9245273584.

The spelling of 198078340 in words is "one hundred ninety-eight million, seventy-eight thousand, three hundred forty".