128898938322 has 270 divisors, whose sum is σ = 360415619109. Its totient is φ = 33266993760.

The previous prime is 128898938227. The next prime is 128898938327. The reversal of 128898938322 is 223839898821.

128898938322 is a `hidden beast` number, since 128 + 89 + 89 + 38 + 322 = 666.

128898938322 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 123123090321 + 5775848001 = 350889^2 + 75999^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=253869.

It is a super-2 number, since 2×128898938322² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 128898938322.

It is not an unprimeable number, because it can be changed into a prime (128898938327) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 821012268 + ... + 821012424.

Almost surely, 2^128898938322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128898938322

128898938322 is an abundant number, since it is smaller than the sum of its proper divisors (231516680787).

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

128898938322 is an equidigital number, since it uses as much as digits as its factorization.

128898938322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 180 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 63.

The spelling of 128898938322 in words is "one hundred twenty-eight billion, eight hundred ninety-eight million, nine hundred thirty-eight thousand, three hundred twenty-two".