128302020 has 144 divisors (see below), whose sum is σ = 485267328. Its totient is φ = 26657280.

The previous prime is 128302019. The next prime is 128302021. The reversal of 128302020 is 20203821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128302019) and next prime (128302021).

It is a super-2 number, since 2×128302020² = 32922816672160800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 128301984 and 128302002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128302021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9232 + ... + 18488.

It is an arithmetic number, because the mean of its divisors is an integer number (3369912).

Almost surely, 2^128302020 is an apocalyptic number.

128302020 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 128302020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242633664).

128302020 is an abundant number, since it is smaller than the sum of its proper divisors (356965308).

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

128302020 is a wasteful number, since it uses less digits than its factorization.

128302020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9290 (or 9285 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 128302020 is about 11327.0481591631. The cubic root of 128302020 is about 504.3644850238.

Adding to 128302020 its reverse (20203821), we get a palindrome (148505841).

The spelling of 128302020 in words is "one hundred twenty-eight million, three hundred two thousand, twenty".