133810138 has 32 divisors (see below), whose sum is σ = 251123328. Its totient is φ = 51950400.

The previous prime is 133810133. The next prime is 133810139. The reversal of 133810138 is 831018331.

It is not an unprimeable number, because it can be changed into a prime (133810133) by changing a digit.

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, 47448 + ... + 50188.

It is an arithmetic number, because the mean of its divisors is an integer number (7847604).

Almost surely, 2^133810138 is an apocalyptic number.

133810138 is a deficient number, since it is larger than the sum of its proper divisors (117313190).

133810138 is a wasteful number, since it uses less digits than its factorization.

133810138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3078.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 133810138 is about 11567.6332064947. The cubic root of 133810138 is about 511.4811969950.

Adding to 133810138 its reverse (831018331), we get a palindrome (964828469).

It can be divided in two parts, 1338 and 10138, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 133810138 in words is "one hundred thirty-three million, eight hundred ten thousand, one hundred thirty-eight".