198101878 has 16 divisors (see below), whose sum is σ = 320349456. Its totient is φ = 91334880.

The previous prime is 198101843. The next prime is 198101947. The reversal of 198101878 is 878101891.

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, 24933 + ... + 31903.

It is an arithmetic number, because the mean of its divisors is an integer number (20021841).

Almost surely, 2^198101878 is an apocalyptic number.

198101878 is a deficient number, since it is larger than the sum of its proper divisors (122247578).

198101878 is a wasteful number, since it uses less digits than its factorization.

198101878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8079.

The product of its (nonzero) digits is 32256, while the sum is 43.

The square root of 198101878 is about 14074.8668910225. The cubic root of 198101878 is about 582.9476164285.

The spelling of 198101878 in words is "one hundred ninety-eight million, one hundred one thousand, eight hundred seventy-eight".