133823424 has 56 divisors (see below), whose sum is σ = 404660608. Its totient is φ = 38234880.

The previous prime is 133823419. The next prime is 133823461. The reversal of 133823424 is 424328331.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×133823424² = 35817417622167552, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 133823391 and 133823400.

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, 48442 + ... + 51129.

Almost surely, 2^133823424 is an apocalyptic number.

133823424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

133823424 is an abundant number, since it is smaller than the sum of its proper divisors (270837184).

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

133823424 is an equidigital number, since it uses as much as digits as its factorization.

133823424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99593 (or 99583 counting only the distinct ones).

The product of its digits is 13824, while the sum is 30.

The square root of 133823424 is about 11568.2074670193. The cubic root of 133823424 is about 511.4981247465.

The spelling of 133823424 in words is "one hundred thirty-three million, eight hundred twenty-three thousand, four hundred twenty-four".