133449228 has 48 divisors (see below), whose sum is σ = 377435520. Its totient is φ = 40438800.

The previous prime is 133449227. The next prime is 133449233. The reversal of 133449228 is 822944331.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 133449192 and 133449201.

It is not an unprimeable number, because it can be changed into a prime (133449227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54978 + ... + 57353.

It is an arithmetic number, because the mean of its divisors is an integer number (7863240).

Almost surely, 2^133449228 is an apocalyptic number.

133449228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

133449228 is an abundant number, since it is smaller than the sum of its proper divisors (243986292).

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

133449228 is a wasteful number, since it uses less digits than its factorization.

133449228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112355 (or 112347 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 133449228 is about 11552.0226800331. The cubic root of 133449228 is about 511.0209306904.

The spelling of 133449228 in words is "one hundred thirty-three million, four hundred forty-nine thousand, two hundred twenty-eight".