128220327 has 10 divisors (see below), whose sum is σ = 191539128. Its totient is φ = 85480164.

The previous prime is 128220299. The next prime is 128220329. The reversal of 128220327 is 723022821.

It is a happy number.

It is not a de Polignac number, because 128220327 - 2⁷ = 128220199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 128220327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128220329) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 791403 + ... + 791564.

Almost surely, 2^128220327 is an apocalyptic number.

128220327 is a deficient number, since it is larger than the sum of its proper divisors (63318801).

128220327 is an equidigital number, since it uses as much as digits as its factorization.

128220327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582979 (or 1582970 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 128220327 is about 11323.4414821643. The cubic root of 128220327 is about 504.2574152729.

It can be divided in two parts, 1282 and 20327, that added together give a square (21609 = 147²).

The spelling of 128220327 in words is "one hundred twenty-eight million, two hundred twenty thousand, three hundred twenty-seven".