128013320 has 16 divisors (see below), whose sum is σ = 288030060. Its totient is φ = 51205312.

The previous prime is 128013271. The next prime is 128013341. The reversal of 128013320 is 23310821.

It can be written as a sum of positive squares in 2 ways, for example, as 128006596 + 6724 = 11314^2 + 82^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 128013292 and 128013301.

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, 1600127 + ... + 1600206.

Almost surely, 2^128013320 is an apocalyptic number.

128013320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128013320 is an abundant number, since it is smaller than the sum of its proper divisors (160016740).

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

128013320 is a wasteful number, since it uses less digits than its factorization.

128013320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200344 (or 3200340 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 128013320 is about 11314.2971500664. The cubic root of 128013320 is about 503.9859007562.

The spelling of 128013320 in words is "one hundred twenty-eight million, thirteen thousand, three hundred twenty".