133441280 has 144 divisors (see below), whose sum is σ = 373512384. Its totient is φ = 44728320.

The previous prime is 133441261. The next prime is 133441289. The reversal of 133441280 is 82144331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133441289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474740 + ... + 475020.

It is an arithmetic number, because the mean of its divisors is an integer number (2593836).

Almost surely, 2^133441280 is an apocalyptic number.

133441280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133441280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186756192).

133441280 is an abundant number, since it is smaller than the sum of its proper divisors (240071104).

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

133441280 is an equidigital number, since it uses as much as digits as its factorization.

133441280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 133441280 is about 11551.6786658909. The cubic root of 133441280 is about 511.0107853213.

The spelling of 133441280 in words is "one hundred thirty-three million, four hundred forty-one thousand, two hundred eighty".