128165936 has 40 divisors (see below), whose sum is σ = 263554560. Its totient is φ = 60247616.

The previous prime is 128165897. The next prime is 128165951. The reversal of 128165936 is 639561821.

It is a junction number, because it is equal to n+sod(n) for n = 128165893 and 128165902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18761 + ... + 24663.

It is an arithmetic number, because the mean of its divisors is an integer number (6588864).

Almost surely, 2^128165936 is an apocalyptic number.

128165936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128165936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131777280).

128165936 is an abundant number, since it is smaller than the sum of its proper divisors (135388624).

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

128165936 is a wasteful number, since it uses less digits than its factorization.

128165936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5993 (or 5987 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 128165936 is about 11321.0395282412. The cubic root of 128165936 is about 504.1861032721.

The spelling of 128165936 in words is "one hundred twenty-eight million, one hundred sixty-five thousand, nine hundred thirty-six".