133673920 has 28 divisors (see below), whose sum is σ = 318311784. Its totient is φ = 53469440.

The previous prime is 133673909. The next prime is 133673927. The reversal of 133673920 is 29376331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133673927) 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 3 ways as a sum of consecutive naturals, for example, 208546 + ... + 209185.

It is an arithmetic number, because the mean of its divisors is an integer number (11368278).

Almost surely, 2^133673920 is an apocalyptic number.

133673920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133673920 is an abundant number, since it is smaller than the sum of its proper divisors (184637864).

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

133673920 is an equidigital number, since it uses as much as digits as its factorization.

133673920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417748 (or 417738 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 34.

The square root of 133673920 is about 11561.7438131105. The cubic root of 133673920 is about 511.3075763652.

The spelling of 133673920 in words is "one hundred thirty-three million, six hundred seventy-three thousand, nine hundred twenty".