133290872 has 128 divisors (see below), whose sum is σ = 312560640. Its totient is φ = 52462080.

The previous prime is 133290847. The next prime is 133290881. The reversal of 133290872 is 278092331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1989383 + ... + 1989449.

It is an arithmetic number, because the mean of its divisors is an integer number (2441880).

Almost surely, 2^133290872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133290872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156280320).

133290872 is an abundant number, since it is smaller than the sum of its proper divisors (179269768).

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

133290872 is a wasteful number, since it uses less digits than its factorization.

133290872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 133290872 is about 11545.1666077194. The cubic root of 133290872 is about 510.8187183042.

The spelling of 133290872 in words is "one hundred thirty-three million, two hundred ninety thousand, eight hundred seventy-two".