133798158 has 48 divisors (see below), whose sum is σ = 316002960. Its totient is φ = 40672656.

The previous prime is 133798121. The next prime is 133798163. The reversal of 133798158 is 851897331.

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

Its product of digits (181440) is a multiple of the sum of its prime factors (270).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1611985 + ... + 1612067.

It is an arithmetic number, because the mean of its divisors is an integer number (6583395).

Almost surely, 2^133798158 is an apocalyptic number.

133798158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133798158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158001480).

133798158 is an abundant number, since it is smaller than the sum of its proper divisors (182204802).

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

133798158 is an frugal number, since it uses more digits than its factorization.

133798158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 101 counting only the distinct ones).

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

The square root of 133798158 is about 11567.1153707396. The cubic root of 133798158 is about 511.4659322632.

It can be divided in two parts, 133798 and 158, that added together give a square (133956 = 366²).

The spelling of 133798158 in words is "one hundred thirty-three million, seven hundred ninety-eight thousand, one hundred fifty-eight".