128132220 has 24 divisors (see below), whose sum is σ = 358770384. Its totient is φ = 34168576.

The previous prime is 128132197. The next prime is 128132239. The reversal of 128132220 is 22231821.

It is a happy number.

It is a congruent number.

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, 1067709 + ... + 1067828.

It is an arithmetic number, because the mean of its divisors is an integer number (14948766).

Almost surely, 2^128132220 is an apocalyptic number.

128132220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128132220 is an abundant number, since it is smaller than the sum of its proper divisors (230638164).

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

128132220 is a wasteful number, since it uses less digits than its factorization.

128132220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135549 (or 2135547 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 128132220 is about 11319.5503444262. The cubic root of 128132220 is about 504.1418881189.

The spelling of 128132220 in words is "one hundred twenty-eight million, one hundred thirty-two thousand, two hundred twenty".