133243404 has 48 divisors (see below), whose sum is σ = 355880448. Its totient is φ = 38009088.

The previous prime is 133243403. The next prime is 133243423. The reversal of 133243404 is 404342331.

It is not an unprimeable number, because it can be changed into a prime (133243403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102084 + ... + 103380.

It is an arithmetic number, because the mean of its divisors is an integer number (7414176).

Almost surely, 2^133243404 is an apocalyptic number.

133243404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

133243404 is an abundant number, since it is smaller than the sum of its proper divisors (222637044).

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

133243404 is a wasteful number, since it uses less digits than its factorization.

133243404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534 (or 2532 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 133243404 is about 11543.1106726047. The cubic root of 133243404 is about 510.7580729364.

Adding to 133243404 its reverse (404342331), we get a palindrome (537585735).

The spelling of 133243404 in words is "one hundred thirty-three million, two hundred forty-three thousand, four hundred four".