198578670 has 16 divisors (see below), whose sum is σ = 476588880. Its totient is φ = 52954304.

The previous prime is 198578663. The next prime is 198578701. The reversal of 198578670 is 76875891.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3309615 + ... + 3309674.

It is an arithmetic number, because the mean of its divisors is an integer number (29786805).

Almost surely, 2^198578670 is an apocalyptic number.

198578670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198578670 is an abundant number, since it is smaller than the sum of its proper divisors (278010210).

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

198578670 is a wasteful number, since it uses less digits than its factorization.

198578670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6619299.

The product of its (nonzero) digits is 846720, while the sum is 51.

The square root of 198578670 is about 14091.7944208678. The cubic root of 198578670 is about 583.4149215586.

The spelling of 198578670 in words is "one hundred ninety-eight million, five hundred seventy-eight thousand, six hundred seventy".