133880928 has 48 divisors (see below), whose sum is σ = 352537920. Its totient is φ = 44487296.

The previous prime is 133880927. The next prime is 133880951. The reversal of 133880928 is 829088331.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 133880928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133880927) 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, 31303 + ... + 35321.

It is an arithmetic number, because the mean of its divisors is an integer number (7344540).

Almost surely, 2^133880928 is an apocalyptic number.

It is an amenable number.

133880928 is an abundant number, since it is smaller than the sum of its proper divisors (218656992).

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

133880928 is a wasteful number, since it uses less digits than its factorization.

133880928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4379 (or 4371 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 133880928 is about 11570.6926326819. The cubic root of 133880928 is about 511.5713779317.

The spelling of 133880928 in words is "one hundred thirty-three million, eight hundred eighty thousand, nine hundred twenty-eight".