128042580 has 48 divisors (see below), whose sum is σ = 360428544. Its totient is φ = 33962880.

The previous prime is 128042573. The next prime is 128042581. The reversal of 128042580 is 85240821.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128042581) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5874 + ... + 17046.

It is an arithmetic number, because the mean of its divisors is an integer number (7508928).

Almost surely, 2^128042580 is an apocalyptic number.

128042580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128042580 is an abundant number, since it is smaller than the sum of its proper divisors (232385964).

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

128042580 is a wasteful number, since it uses less digits than its factorization.

128042580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11376 (or 11374 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 128042580 is about 11315.5901304351. The cubic root of 128042580 is about 504.0242965107.

The spelling of 128042580 in words is "one hundred twenty-eight million, forty-two thousand, five hundred eighty".