136177728 has 56 divisors (see below), whose sum is σ = 369112800. Its totient is φ = 44282880.

The previous prime is 136177709. The next prime is 136177729. The reversal of 136177728 is 827771631.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 136177728.

It is not an unprimeable number, because it can be changed into a prime (136177729) 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, 778 + ... + 16521.

It is an arithmetic number, because the mean of its divisors is an integer number (6591300).

Almost surely, 2^136177728 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 136177728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184556400).

136177728 is an abundant number, since it is smaller than the sum of its proper divisors (232935072).

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

136177728 is a wasteful number, since it uses less digits than its factorization.

136177728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17355 (or 17345 counting only the distinct ones).

The product of its digits is 98784, while the sum is 42.

The square root of 136177728 is about 11669.5213269440. The cubic root of 136177728 is about 514.4802347057.

The spelling of 136177728 in words is "one hundred thirty-six million, one hundred seventy-seven thousand, seven hundred twenty-eight".