128034220 has 48 divisors (see below), whose sum is σ = 280415520. Its totient is φ = 49078848.

The previous prime is 128034211. The next prime is 128034233. The reversal of 128034220 is 22430821.

It is a super-2 number, since 2×128034220² = 32785522982016800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 128034191 and 128034200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2415714 + ... + 2415766.

It is an arithmetic number, because the mean of its divisors is an integer number (5841990).

Almost surely, 2^128034220 is an apocalyptic number.

128034220 is a gapful number since it is divisible by the number (10) 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 128034220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140207760).

128034220 is an abundant number, since it is smaller than the sum of its proper divisors (152381300).

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

128034220 is an frugal number, since it uses more digits than its factorization.

128034220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 128034220 is about 11315.2207225489. The cubic root of 128034220 is about 504.0133268921.

The spelling of 128034220 in words is "one hundred twenty-eight million, thirty-four thousand, two hundred twenty".