133718320 has 40 divisors (see below), whose sum is σ = 324416736. Its totient is φ = 51161088.

The previous prime is 133718309. The next prime is 133718329. The reversal of 133718320 is 23817331.

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 (133718329) 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, 34497 + ... + 38176.

Almost surely, 2^133718320 is an apocalyptic number.

133718320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133718320 is an abundant number, since it is smaller than the sum of its proper divisors (190698416).

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

133718320 is a wasteful number, since it uses less digits than its factorization.

133718320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72709 (or 72703 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 133718320 is about 11563.6637792700. The cubic root of 133718320 is about 511.3641806336.

The spelling of 133718320 in words is "one hundred thirty-three million, seven hundred eighteen thousand, three hundred twenty".