133335440 has 40 divisors (see below), whose sum is σ = 354292800. Its totient is φ = 45714816.

The previous prime is 133335431. The next prime is 133335443. The reversal of 133335440 is 44533331.

It is a happy number.

133335440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (133335443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118490 + ... + 119609.

It is an arithmetic number, because the mean of its divisors is an integer number (8857320).

Almost surely, 2^133335440 is an apocalyptic number.

133335440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133335440 is an abundant number, since it is smaller than the sum of its proper divisors (220957360).

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

133335440 is a wasteful number, since it uses less digits than its factorization.

133335440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238119 (or 238113 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 26.

The square root of 133335440 is about 11547.0966047747. The cubic root of 133335440 is about 510.8756455124.

Adding to 133335440 its reverse (44533331), we get a palindrome (177868771).

The spelling of 133335440 in words is "one hundred thirty-three million, three hundred thirty-five thousand, four hundred forty".