128355696 has 90 divisors (see below), whose sum is σ = 417888432. Its totient is φ = 36671040.

The previous prime is 128355691. The next prime is 128355713. The reversal of 128355696 is 696553821.

128355696 is a `hidden beast` number, since 1 + 2 + 8 + 3 + 556 + 96 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128355691) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2040 + ... + 16151.

Almost surely, 2^128355696 is an apocalyptic number.

128355696 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 128355696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208944216).

128355696 is an abundant number, since it is smaller than the sum of its proper divisors (289532736).

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

128355696 is a wasteful number, since it uses less digits than its factorization.

128355696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18219 (or 18203 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 128355696 is about 11329.4172842208. The cubic root of 128355696 is about 504.4348099589.

The spelling of 128355696 in words is "one hundred twenty-eight million, three hundred fifty-five thousand, six hundred ninety-six".