133738818 has 8 divisors (see below), whose sum is σ = 267477648. Its totient is φ = 44579604.

The previous prime is 133738793. The next prime is 133738819. The reversal of 133738818 is 818837331.

It is a sphenic number, since it is the product of 3 distinct primes.

133738818 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 133738818.

It is not an unprimeable number, because it can be changed into a prime (133738819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11144896 + ... + 11144907.

It is an arithmetic number, because the mean of its divisors is an integer number (33434706).

Almost surely, 2^133738818 is an apocalyptic number.

133738818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

133738818 is a wasteful number, since it uses less digits than its factorization.

133738818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22289808.

The product of its digits is 96768, while the sum is 42.

The square root of 133738818 is about 11564.5500560982. The cubic root of 133738818 is about 511.3903087100.

The spelling of 133738818 in words is "one hundred thirty-three million, seven hundred thirty-eight thousand, eight hundred eighteen".