198394810 has 8 divisors (see below), whose sum is σ = 357110676. Its totient is φ = 79357920.

The previous prime is 198394793. The next prime is 198394853. The reversal of 198394810 is 18493891.

It can be written as a sum of positive squares in 2 ways, for example, as 180391761 + 18003049 = 13431^2 + 4243^2 .

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

It is a super-2 number, since 2×198394810² = 78721001269872200, which contains 22 as substring.

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, 9919731 + ... + 9919750.

Almost surely, 2^198394810 is an apocalyptic number.

198394810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198394810 is a deficient number, since it is larger than the sum of its proper divisors (158715866).

198394810 is a wasteful number, since it uses less digits than its factorization.

198394810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19839488.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 198394810 is about 14085.2692555024. The cubic root of 198394810 is about 583.2348085756.

It can be divided in two parts, 19839 and 4810, that added together give a square (24649 = 157²).

The spelling of 198394810 in words is "one hundred ninety-eight million, three hundred ninety-four thousand, eight hundred ten".