133628224 has 14 divisors (see below), whose sum is σ = 265168634. Its totient is φ = 66814080.

The previous prime is 133628221. The next prime is 133628239. The reversal of 133628224 is 422826331.

It can be written as a sum of positive squares in only one way, i.e., 73410624 + 60217600 = 8568^2 + 7760^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133628221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043907 + ... + 1044034.

Almost surely, 2^133628224 is an apocalyptic number.

It is an amenable number.

133628224 is a deficient number, since it is larger than the sum of its proper divisors (131540410).

133628224 is an equidigital number, since it uses as much as digits as its factorization.

133628224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087953 (or 2087943 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 133628224 is about 11559.7674717098. The cubic root of 133628224 is about 511.2493067743.

The spelling of 133628224 in words is "one hundred thirty-three million, six hundred twenty-eight thousand, two hundred twenty-four".