133504320 has 56 divisors (see below), whose sum is σ = 423879264. Its totient is φ = 35600896.

The previous prime is 133504307. The next prime is 133504331. The reversal of 133504320 is 23405331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68574 + ... + 70493.

Almost surely, 2^133504320 is an apocalyptic number.

133504320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133504320 is an abundant number, since it is smaller than the sum of its proper divisors (290374944).

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

133504320 is a wasteful number, since it uses less digits than its factorization.

133504320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139087 (or 139077 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 133504320 is about 11554.4069514623. The cubic root of 133504320 is about 511.0912428040.

Adding to 133504320 its reverse (23405331), we get a palindrome (156909651).

The spelling of 133504320 in words is "one hundred thirty-three million, five hundred four thousand, three hundred twenty".