133440330 has 16 divisors (see below), whose sum is σ = 320256864. Its totient is φ = 35584080.

The previous prime is 133440323. The next prime is 133440331. The reversal of 133440330 is 33044331.

It is a junction number, because it is equal to n+sod(n) for n = 133440297 and 133440306.

It is not an unprimeable number, because it can be changed into a prime (133440331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2223976 + ... + 2224035.

It is an arithmetic number, because the mean of its divisors is an integer number (20016054).

Almost surely, 2^133440330 is an apocalyptic number.

133440330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133440330 is an abundant number, since it is smaller than the sum of its proper divisors (186816534).

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

133440330 is a wasteful number, since it uses less digits than its factorization.

133440330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4448021.

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 133440330 is about 11551.6375462529. The cubic root of 133440330 is about 511.0095726496.

Adding to 133440330 its reverse (33044331), we get a palindrome (166484661).

The spelling of 133440330 in words is "one hundred thirty-three million, four hundred forty thousand, three hundred thirty".