128708790 has 48 divisors (see below), whose sum is σ = 359338032. Its totient is φ = 29418816.

The previous prime is 128708771. The next prime is 128708791. The reversal of 128708790 is 97807821.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128708791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42309 + ... + 45248.

It is an arithmetic number, because the mean of its divisors is an integer number (7486209).

Almost surely, 2^128708790 is an apocalyptic number.

128708790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128708790 is an abundant number, since it is smaller than the sum of its proper divisors (230629242).

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

128708790 is a wasteful number, since it uses less digits than its factorization.

128708790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87581 (or 87574 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 128708790 is about 11344.9896430098. The cubic root of 128708790 is about 504.8969367823.

The spelling of 128708790 in words is "one hundred twenty-eight million, seven hundred eight thousand, seven hundred ninety".