133420432 has 40 divisors (see below), whose sum is σ = 274813760. Its totient is φ = 62570880.

The previous prime is 133420423. The next prime is 133420433. The reversal of 133420432 is 234024331.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133420433) 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, 29182 + ... + 33442.

It is an arithmetic number, because the mean of its divisors is an integer number (6870344).

Almost surely, 2^133420432 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 133420432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137406880).

133420432 is an abundant number, since it is smaller than the sum of its proper divisors (141393328).

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

133420432 is a wasteful number, since it uses less digits than its factorization.

133420432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4391 (or 4385 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 133420432 is about 11550.7762509712. The cubic root of 133420432 is about 510.9841715985.

Adding to 133420432 its reverse (234024331), we get a palindrome (367444763).

The spelling of 133420432 in words is "one hundred thirty-three million, four hundred twenty thousand, four hundred thirty-two".