133916528 has 40 divisors (see below), whose sum is σ = 270399360. Its totient is φ = 64177920.

The previous prime is 133916521. The next prime is 133916543. The reversal of 133916528 is 825619331.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 133916491 and 133916500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133916521) 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, 52826 + ... + 55302.

It is an arithmetic number, because the mean of its divisors is an integer number (6759984).

Almost surely, 2^133916528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133916528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135199680).

133916528 is an abundant number, since it is smaller than the sum of its proper divisors (136482832).

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

133916528 is a wasteful number, since it uses less digits than its factorization.

133916528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625 (or 2619 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 133916528 is about 11572.2308998741. The cubic root of 133916528 is about 511.6167175414.

The spelling of 133916528 in words is "one hundred thirty-three million, nine hundred sixteen thousand, five hundred twenty-eight".