133868 has 18 divisors (see below), whose sum is σ = 272916. Its totient is φ = 57288.

The previous prime is 133853. The next prime is 133873. The reversal of 133868 is 868331.

It is a self number, because there is not a number n which added to its sum of digits gives 133868.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 146 + ... + 537.

It is an arithmetic number, because the mean of its divisors is an integer number (15162).

2¹³³⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

133868 is an abundant number, since it is smaller than the sum of its proper divisors (139048).

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

133868 is a wasteful number, since it uses less digits than its factorization.

133868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 692 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 133868 is about 365.8797616704. The cubic root of 133868 is about 51.1554911041.

It can be divided in two parts, 133 and 868, that added together give a palindrome (1001).

The spelling of 133868 in words is "one hundred thirty-three thousand, eight hundred sixty-eight".