136481728 has 28 divisors (see below), whose sum is σ = 271741392. Its totient is φ = 68011520.

The previous prime is 136481717. The next prime is 136481771. The reversal of 136481728 is 827184631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16476 + ... + 23332.

Almost surely, 2^136481728 is an apocalyptic number.

It is an amenable number.

136481728 is a deficient number, since it is larger than the sum of its proper divisors (135259664).

136481728 is an equidigital number, since it uses as much as digits as its factorization.

136481728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7180 (or 7170 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 136481728 is about 11682.5394499655. The cubic root of 136481728 is about 514.8627880915.

It can be divided in two parts, 13648 and 1728, that added together give a square (15376 = 124²).

The spelling of 136481728 in words is "one hundred thirty-six million, four hundred eighty-one thousand, seven hundred twenty-eight".