133455872 has 56 divisors (see below), whose sum is σ = 291355272. Its totient is φ = 60620800.

The previous prime is 133455871. The next prime is 133455887. The reversal of 133455872 is 278554331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133455871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89372 + ... + 90852.

Almost surely, 2^133455872 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 133455872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145677636).

133455872 is an abundant number, since it is smaller than the sum of its proper divisors (157899400).

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

133455872 is an equidigital number, since it uses as much as digits as its factorization.

133455872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518 (or 1494 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 133455872 is about 11552.3102451414. The cubic root of 133455872 is about 511.0294112358.

The spelling of 133455872 in words is "one hundred thirty-three million, four hundred fifty-five thousand, eight hundred seventy-two".