128268020 has 12 divisors (see below), whose sum is σ = 269362884. Its totient is φ = 51307200.

The previous prime is 128268017. The next prime is 128268053. The reversal of 128268020 is 20862821.

It can be written as a sum of positive squares in 2 ways, for example, as 91738084 + 36529936 = 9578^2 + 6044^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3206681 + ... + 3206720.

It is an arithmetic number, because the mean of its divisors is an integer number (22446907).

Almost surely, 2^128268020 is an apocalyptic number.

128268020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128268020 is an abundant number, since it is smaller than the sum of its proper divisors (141094864).

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

128268020 is a wasteful number, since it uses less digits than its factorization.

128268020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6413410 (or 6413408 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 128268020 is about 11325.5472273970. The cubic root of 128268020 is about 504.3199289378.

The spelling of 128268020 in words is "one hundred twenty-eight million, two hundred sixty-eight thousand, twenty".