198617370 has 64 divisors (see below), whose sum is σ = 547658496. Its totient is φ = 45158400.

The previous prime is 198617357. The next prime is 198617371. The reversal of 198617370 is 73716891.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (198617371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38970 + ... + 43770.

It is an arithmetic number, because the mean of its divisors is an integer number (8557164).

Almost surely, 2^198617370 is an apocalyptic number.

198617370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 198617370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273829248).

198617370 is an abundant number, since it is smaller than the sum of its proper divisors (349041126).

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

198617370 is a wasteful number, since it uses less digits than its factorization.

198617370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5015.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 198617370 is about 14093.1674935055. The cubic root of 198617370 is about 583.4528186985.

The spelling of 198617370 in words is "one hundred ninety-eight million, six hundred seventeen thousand, three hundred seventy".