133803280 has 40 divisors (see below), whose sum is σ = 335025432. Its totient is φ = 49403904.

The previous prime is 133803253. The next prime is 133803281. The reversal of 133803280 is 82308331.

It can be written as a sum of positive squares in 4 ways, for example, as 262144 + 133541136 = 512^2 + 11556^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (133803281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63289 + ... + 65368.

Almost surely, 2^133803280 is an apocalyptic number.

133803280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133803280 is an abundant number, since it is smaller than the sum of its proper divisors (201222152).

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

133803280 is a wasteful number, since it uses less digits than its factorization.

133803280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128683 (or 128677 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 133803280 is about 11567.3367721356. The cubic root of 133803280 is about 511.4724587483.

The spelling of 133803280 in words is "one hundred thirty-three million, eight hundred three thousand, two hundred eighty".