133824478 has 4 divisors (see below), whose sum is σ = 200736720. Its totient is φ = 66912238.

The previous prime is 133824461. The next prime is 133824479. The reversal of 133824478 is 874428331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874428331 = 7 ⋅124918333.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 133824478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133824479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33456118 + ... + 33456121.

It is an arithmetic number, because the mean of its divisors is an integer number (50184180).

Almost surely, 2^133824478 is an apocalyptic number.

133824478 is a deficient number, since it is larger than the sum of its proper divisors (66912242).

133824478 is an equidigital number, since it uses as much as digits as its factorization.

133824478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66912241.

The product of its digits is 129024, while the sum is 40.

The square root of 133824478 is about 11568.2530228207. The cubic root of 133824478 is about 511.4994676046.

The spelling of 133824478 in words is "one hundred thirty-three million, eight hundred twenty-four thousand, four hundred seventy-eight".