133799860 has 48 divisors (see below), whose sum is σ = 300649104. Its totient is φ = 49840128.

The previous prime is 133799857. The next prime is 133799879. The reversal of 133799860 is 68997331.

It can be written as a sum of positive squares in 8 ways, for example, as 443556 + 133356304 = 666^2 + 11548^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 133799860.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30952 + ... + 35008.

It is an arithmetic number, because the mean of its divisors is an integer number (6263523).

Almost surely, 2^133799860 is an apocalyptic number.

133799860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133799860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150324552).

133799860 is an abundant number, since it is smaller than the sum of its proper divisors (166849244).

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

133799860 is a wasteful number, since it uses less digits than its factorization.

133799860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4180 (or 4178 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 133799860 is about 11567.1889411386. The cubic root of 133799860 is about 511.4681009809.

The spelling of 133799860 in words is "one hundred thirty-three million, seven hundred ninety-nine thousand, eight hundred sixty".