135680256 has 54 divisors (see below), whose sum is σ = 391206270. Its totient is φ = 45225984.

The previous prime is 135680249. The next prime is 135680261. The reversal of 135680256 is 652086531.

It can be written as a sum of positive squares in only one way, i.e., 99680256 + 36000000 = 9984^2 + 6000^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 135680256.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27141 + ... + 31748.

Almost surely, 2^135680256 is an apocalyptic number.

135680256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

135680256 is an abundant number, since it is smaller than the sum of its proper divisors (255526014).

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

135680256 is an equidigital number, since it uses as much as digits as its factorization.

135680256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58911 (or 58894 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 135680256 is about 11648.1868116888. The cubic root of 135680256 is about 513.8529862626.

The spelling of 135680256 in words is "one hundred thirty-five million, six hundred eighty thousand, two hundred fifty-six".