133423448 has 8 divisors (see below), whose sum is σ = 250168980. Its totient is φ = 66711720.

The previous prime is 133423447. The next prime is 133423457. The reversal of 133423448 is 844324331.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133423441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8338958 + ... + 8338973.

Almost surely, 2^133423448 is an apocalyptic number.

It is an amenable number.

133423448 is a deficient number, since it is larger than the sum of its proper divisors (116745532).

133423448 is a wasteful number, since it uses less digits than its factorization.

133423448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16677937 (or 16677933 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

The square root of 133423448 is about 11550.9068042297. The cubic root of 133423448 is about 510.9880218750.

Adding to 133423448 its reverse (844324331), we get a palindrome (977747779).

The spelling of 133423448 in words is "one hundred thirty-three million, four hundred twenty-three thousand, four hundred forty-eight".