133904560 has 20 divisors (see below), whose sum is σ = 311328288. Its totient is φ = 53561792.

The previous prime is 133904543. The next prime is 133904567. The reversal of 133904560 is 65409331.

133904560 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (133904567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836824 + ... + 836983.

Almost surely, 2^133904560 is an apocalyptic number.

133904560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133904560 is an abundant number, since it is smaller than the sum of its proper divisors (177423728).

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

133904560 is a wasteful number, since it uses less digits than its factorization.

133904560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673820 (or 1673814 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 133904560 is about 11571.7137883721. The cubic root of 133904560 is about 511.6014761783.

The spelling of 133904560 in words is "one hundred thirty-three million, nine hundred four thousand, five hundred sixty".