133700028 has 96 divisors (see below), whose sum is σ = 397017600. Its totient is φ = 34715520.

The previous prime is 133700027. The next prime is 133700051. The reversal of 133700028 is 820007331.

It is a junction number, because it is equal to n+sod(n) for n = 133699980 and 133700007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133700023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43800 + ... + 46752.

It is an arithmetic number, because the mean of its divisors is an integer number (4135600).

Almost surely, 2^133700028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133700028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198508800).

133700028 is an abundant number, since it is smaller than the sum of its proper divisors (263317572).

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

133700028 is a wasteful number, since it uses less digits than its factorization.

133700028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992 (or 2976 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 133700028 is about 11562.8728264216. The cubic root of 133700028 is about 511.3408622129.

Adding to 133700028 its reverse (820007331), we get a palindrome (953707359).

The spelling of 133700028 in words is "one hundred thirty-three million, seven hundred thousand, twenty-eight".