133868418 has 16 divisors (see below), whose sum is σ = 279377856. Its totient is φ = 42682640.

The previous prime is 133868411. The next prime is 133868419. The reversal of 133868418 is 814868331.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 133868418.

It is not an unprimeable number, because it can be changed into a prime (133868411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484893 + ... + 485168.

It is an arithmetic number, because the mean of its divisors is an integer number (17461116).

Almost surely, 2^133868418 is an apocalyptic number.

133868418 is an abundant number, since it is smaller than the sum of its proper divisors (145509438).

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

133868418 is a wasteful number, since it uses less digits than its factorization.

133868418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970089.

The product of its digits is 110592, while the sum is 42.

The square root of 133868418 is about 11570.1520301161. The cubic root of 133868418 is about 511.5554434807. Note that the first 3 decimals are identical.

The spelling of 133868418 in words is "one hundred thirty-three million, eight hundred sixty-eight thousand, four hundred eighteen".