128752220 has 24 divisors (see below), whose sum is σ = 286285104. Its totient is φ = 48471296.

The previous prime is 128752201. The next prime is 128752231. The reversal of 128752220 is 22257821.

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, 189002 + ... + 189681.

It is an arithmetic number, because the mean of its divisors is an integer number (11928546).

Almost surely, 2^128752220 is an apocalyptic number.

128752220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128752220 is an abundant number, since it is smaller than the sum of its proper divisors (157532884).

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

128752220 is a wasteful number, since it uses less digits than its factorization.

128752220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378709 (or 378707 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 128752220 is about 11346.9035423767. The cubic root of 128752220 is about 504.9537192499.

The spelling of 128752220 in words is "one hundred twenty-eight million, seven hundred fifty-two thousand, two hundred twenty".