128787246 has 60 divisors (see below), whose sum is σ = 330785928. Its totient is φ = 36687168.

The previous prime is 128787229. The next prime is 128787251. The reversal of 128787246 is 642787821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 381990 + ... + 382326.

Almost surely, 2^128787246 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128787246, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165392964).

128787246 is an abundant number, since it is smaller than the sum of its proper divisors (201998682).

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

128787246 is an frugal number, since it uses more digits than its factorization.

128787246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 349 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 128787246 is about 11348.4468540854. The cubic root of 128787246 is about 504.9995046232. Note that the first 3 decimals are identical.

The spelling of 128787246 in words is "one hundred twenty-eight million, seven hundred eighty-seven thousand, two hundred forty-six".