136637928 has 112 divisors (see below), whose sum is σ = 439123680. Its totient is φ = 39027744.

The previous prime is 136637887. The next prime is 136637939. The reversal of 136637928 is 829736631.

136637928 is a `hidden beast` number, since 1 + 3 + 6 + 637 + 9 + 2 + 8 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 39151 + ... + 42497.

Almost surely, 2^136637928 is an apocalyptic number.

136637928 is a gapful number since it is divisible by the number (18) 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 136637928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219561840).

136637928 is an abundant number, since it is smaller than the sum of its proper divisors (302485752).

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

136637928 is an equidigital number, since it uses as much as digits as its factorization.

136637928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378 (or 3359 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 136637928 is about 11689.2227286505. Note that the first 3 decimals coincide. The cubic root of 136637928 is about 515.0591291646.

The spelling of 136637928 in words is "one hundred thirty-six million, six hundred thirty-seven thousand, nine hundred twenty-eight".