136205128 has 8 divisors (see below), whose sum is σ = 255384630. Its totient is φ = 68102560.

The previous prime is 136205101. The next prime is 136205137. The reversal of 136205128 is 821502631.

It can be written as a sum of positive squares in only one way, i.e., 78110244 + 58094884 = 8838^2 + 7622^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

136205128 is a modest number, since divided by 205128 gives 136 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 136205096 and 136205105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8512813 + ... + 8512828.

Almost surely, 2^136205128 is an apocalyptic number.

It is an amenable number.

136205128 is a deficient number, since it is larger than the sum of its proper divisors (119179502).

136205128 is a wasteful number, since it uses less digits than its factorization.

136205128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17025647 (or 17025643 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 136205128 is about 11670.6952663498. The cubic root of 136205128 is about 514.5147381772.

Adding to 136205128 its reverse (821502631), we get a palindrome (957707759).

The spelling of 136205128 in words is "one hundred thirty-six million, two hundred five thousand, one hundred twenty-eight".