128890122235 has 8 divisors (see below), whose sum is σ = 176763596256. Its totient is φ = 88381798080.

The previous prime is 128890122223. The next prime is 128890122299. The reversal of 128890122235 is 532221098821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-128890122235 is a prime.

It is a super-2 number, since 2×128890122235² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128890122191 and 128890122200.

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, 1841287426 + ... + 1841287495.

It is an arithmetic number, because the mean of its divisors is an integer number (22095449532).

Almost surely, 2^128890122235 is an apocalyptic number.

128890122235 is a deficient number, since it is larger than the sum of its proper divisors (47873474021).

128890122235 is an equidigital number, since it uses as much as digits as its factorization.

128890122235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682574933.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 128890122235 in words is "one hundred twenty-eight billion, eight hundred ninety million, one hundred twenty-two thousand, two hundred thirty-five".