133245280 has 96 divisors (see below), whose sum is σ = 361912320. Its totient is φ = 45411840.

The previous prime is 133245257. The next prime is 133245293. The reversal of 133245280 is 82542331.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

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, 303301 + ... + 303739.

It is an arithmetic number, because the mean of its divisors is an integer number (3769920).

Almost surely, 2^133245280 is an apocalyptic number.

133245280 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 133245280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180956160).

133245280 is an abundant number, since it is smaller than the sum of its proper divisors (228667040).

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

133245280 is a wasteful number, since it uses less digits than its factorization.

133245280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 133245280 is about 11543.1919329101. The cubic root of 133245280 is about 510.7604699972.

The spelling of 133245280 in words is "one hundred thirty-three million, two hundred forty-five thousand, two hundred eighty".