136743728 has 80 divisors (see below), whose sum is σ = 303409152. Its totient is φ = 59136000.

The previous prime is 136743709. The next prime is 136743731. The reversal of 136743728 is 827347631.

136743728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387200 + ... + 387552.

Almost surely, 2^136743728 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 136743728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151704576).

136743728 is an abundant number, since it is smaller than the sum of its proper divisors (166665424).

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

136743728 is a wasteful number, since it uses less digits than its factorization.

136743728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 468 counting only the distinct ones).

The product of its digits is 169344, while the sum is 41.

The square root of 136743728 is about 11693.7473890964. The cubic root of 136743728 is about 515.1920332024.

The spelling of 136743728 in words is "one hundred thirty-six million, seven hundred forty-three thousand, seven hundred twenty-eight".