133989504 has 64 divisors (see below), whose sum is σ = 388277280. Its totient is φ = 40601600.

The previous prime is 133989497. The next prime is 133989509. The reversal of 133989504 is 405989331.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (133989509) 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, 11637 + ... + 20084.

Almost surely, 2^133989504 is an apocalyptic number.

It is an amenable number.

133989504 is an abundant number, since it is smaller than the sum of its proper divisors (254287776).

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

133989504 is a wasteful number, since it uses less digits than its factorization.

133989504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31749 (or 31737 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 133989504 is about 11575.3835357624. The cubic root of 133989504 is about 511.7096335350.

The spelling of 133989504 in words is "one hundred thirty-three million, nine hundred eighty-nine thousand, five hundred four".