128727136 has 24 divisors (see below), whose sum is σ = 264451824. Its totient is φ = 61564800.

The previous prime is 128727127. The next prime is 128727139. The reversal of 128727136 is 631727821.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 128727095 and 128727104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128727139) 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, 86715 + ... + 88186.

It is an arithmetic number, because the mean of its divisors is an integer number (11018826).

Almost surely, 2^128727136 is an apocalyptic number.

128727136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128727136 is an abundant number, since it is smaller than the sum of its proper divisors (135724688).

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

128727136 is a wasteful number, since it uses less digits than its factorization.

128727136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174934 (or 174926 counting only the distinct ones).

The product of its digits is 28224, while the sum is 37.

The square root of 128727136 is about 11345.7981649596. The cubic root of 128727136 is about 504.9209247817.

The spelling of 128727136 in words is "one hundred twenty-eight million, seven hundred twenty-seven thousand, one hundred thirty-six".