128342136 has 128 divisors (see below), whose sum is σ = 361267200. Its totient is φ = 37739520.

The previous prime is 128342117. The next prime is 128342167. The reversal of 128342136 is 631243821.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1010505 + ... + 1010631.

It is an arithmetic number, because the mean of its divisors is an integer number (2822400).

Almost surely, 2^128342136 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 128342136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180633600).

128342136 is an abundant number, since it is smaller than the sum of its proper divisors (232925064).

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

128342136 is a wasteful number, since it uses less digits than its factorization.

128342136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 265 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 128342136 is about 11328.8188263384. The cubic root of 128342136 is about 504.4170458416.

Adding to 128342136 its reverse (631243821), we get a palindrome (759585957).

The spelling of 128342136 in words is "one hundred twenty-eight million, three hundred forty-two thousand, one hundred thirty-six".