128275620 has 96 divisors (see below), whose sum is σ = 393845760. Its totient is φ = 30936960.

The previous prime is 128275607. The next prime is 128275649. The reversal of 128275620 is 26572821.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173211 + ... + 173949.

It is an arithmetic number, because the mean of its divisors is an integer number (4102560).

Almost surely, 2^128275620 is an apocalyptic number.

128275620 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 128275620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196922880).

128275620 is an abundant number, since it is smaller than the sum of its proper divisors (265570140).

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

128275620 is a wasteful number, since it uses less digits than its factorization.

128275620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025 (or 1023 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 128275620 is about 11325.8827470533. The cubic root of 128275620 is about 504.3298892167.

The spelling of 128275620 in words is "one hundred twenty-eight million, two hundred seventy-five thousand, six hundred twenty".