133409388 has 48 divisors (see below), whose sum is σ = 356396544. Its totient is φ = 38048640.

The previous prime is 133409371. The next prime is 133409389. The reversal of 133409388 is 883904331.

It is not an unprimeable number, because it can be changed into a prime (133409389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62881 + ... + 64967.

It is an arithmetic number, because the mean of its divisors is an integer number (7424928).

Almost surely, 2^133409388 is an apocalyptic number.

It is an amenable number.

133409388 is an abundant number, since it is smaller than the sum of its proper divisors (222987156).

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

133409388 is a wasteful number, since it uses less digits than its factorization.

133409388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862 (or 2860 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 133409388 is about 11550.2981779693. The cubic root of 133409388 is about 510.9700721466.

The spelling of 133409388 in words is "one hundred thirty-three million, four hundred nine thousand, three hundred eighty-eight".