128223793170 has 144 divisors (see below), whose sum is σ = 372657317760. Its totient is φ = 30557545920.

The previous prime is 128223793169. The next prime is 128223793177. The reversal of 128223793170 is 71397322821.

It is a super-2 number, since 2×128223793170² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (128223793177) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 542727 + ... + 742293.

It is an arithmetic number, because the mean of its divisors is an integer number (2587898040).

Almost surely, 2^128223793170 is an apocalyptic number.

128223793170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128223793170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186328658880).

128223793170 is an abundant number, since it is smaller than the sum of its proper divisors (244433524590).

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

128223793170 is a wasteful number, since it uses less digits than its factorization.

128223793170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199661 (or 199647 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 128223793170 in words is "one hundred twenty-eight billion, two hundred twenty-three million, seven hundred ninety-three thousand, one hundred seventy".