128038580 has 12 divisors (see below), whose sum is σ = 268881060. Its totient is φ = 51215424.

The previous prime is 128038571. The next prime is 128038583. The reversal of 128038580 is 85830821.

It can be written as a sum of positive squares in 2 ways, for example, as 92659876 + 35378704 = 9626^2 + 5948^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128038580.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128038583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3200945 + ... + 3200984.

It is an arithmetic number, because the mean of its divisors is an integer number (22406755).

Almost surely, 2^128038580 is an apocalyptic number.

128038580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128038580 is an abundant number, since it is smaller than the sum of its proper divisors (140842480).

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

128038580 is a wasteful number, since it uses less digits than its factorization.

128038580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401938 (or 6401936 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 128038580 is about 11315.4133817550. The cubic root of 128038580 is about 504.0190479490.

The spelling of 128038580 in words is "one hundred twenty-eight million, thirty-eight thousand, five hundred eighty".