134720784 has 120 divisors (see below), whose sum is σ = 435588192. Its totient is φ = 38415360.

The previous prime is 134720783. The next prime is 134720791. The reversal of 134720784 is 487027431.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (134720783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24427 + ... + 29429.

Almost surely, 2^134720784 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 134720784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217794096).

134720784 is an abundant number, since it is smaller than the sum of its proper divisors (300867408).

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

134720784 is a wasteful number, since it uses less digits than its factorization.

134720784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045 (or 5036 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 134720784 is about 11606.9282758187. The cubic root of 134720784 is about 512.6388712703.

The spelling of 134720784 in words is "one hundred thirty-four million, seven hundred twenty thousand, seven hundred eighty-four".