198378135 has 48 divisors (see below), whose sum is σ = 354635424. Its totient is φ = 102525696.

The previous prime is 198378113. The next prime is 198378149. The reversal of 198378135 is 531873891.

198378135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198378135 - 2⁶ = 198378071 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (181440) is a multiple of the sum of its prime factors (864).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 303469 + ... + 304121.

It is an arithmetic number, because the mean of its divisors is an integer number (7388238).

Almost surely, 2^198378135 is an apocalyptic number.

198378135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

198378135 is a deficient number, since it is larger than the sum of its proper divisors (156257289).

198378135 is a wasteful number, since it uses less digits than its factorization.

198378135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 861 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 198378135 is about 14084.6773125975. The cubic root of 198378135 is about 583.2184679046.

It can be divided in two parts, 19837 and 8135, that added together give a palindrome (27972).

The spelling of 198378135 in words is "one hundred ninety-eight million, three hundred seventy-eight thousand, one hundred thirty-five".