128486736 has 120 divisors (see below), whose sum is σ = 426264384. Its totient is φ = 36702720.

The previous prime is 128486711. The next prime is 128486747. The reversal of 128486736 is 637684821.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 128486691 and 128486700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24856 + ... + 29576.

Almost surely, 2^128486736 is an apocalyptic number.

128486736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128486736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213132192).

128486736 is an abundant number, since it is smaller than the sum of its proper divisors (297777648).

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

128486736 is an equidigital number, since it uses as much as digits as its factorization.

128486736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751 (or 4733 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 128486736 is about 11335.1989836968. The cubic root of 128486736 is about 504.6064129283.

The spelling of 128486736 in words is "one hundred twenty-eight million, four hundred eighty-six thousand, seven hundred thirty-six".