133628 has 12 divisors (see below), whose sum is σ = 255192. Its totient is φ = 60720.

The previous prime is 133597. The next prime is 133631. The reversal of 133628 is 826331.

133628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

133628 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1475 + ... + 1562.

It is an arithmetic number, because the mean of its divisors is an integer number (21266).

2¹³³⁶²⁸ is an apocalyptic number.

It is an amenable number.

133628 is a deficient number, since it is larger than the sum of its proper divisors (121564).

133628 is a wasteful number, since it uses less digits than its factorization.

133628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052 (or 3050 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 133628 is about 365.5516379392. The cubic root of 133628 is about 51.1249021106.

Adding to 133628 its reverse (826331), we get a palindrome (959959).

The spelling of 133628 in words is "one hundred thirty-three thousand, six hundred twenty-eight".