136810638 has 24 divisors (see below), whose sum is σ = 296668008. Its totient is φ = 45565872.

The previous prime is 136810633. The next prime is 136810651. The reversal of 136810638 is 836018631.

136810638 is a `hidden beast` number, since 1 + 3 + 6 + 8 + 10 + 638 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136810633) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 27145 + ... + 31787.

It is an arithmetic number, because the mean of its divisors is an integer number (12361167).

Almost surely, 2^136810638 is an apocalyptic number.

136810638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

136810638 is an abundant number, since it is smaller than the sum of its proper divisors (159857370).

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

136810638 is a wasteful number, since it uses less digits than its factorization.

136810638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6288 (or 6285 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 136810638 is about 11696.6079698347. The cubic root of 136810638 is about 515.2760489462.

The spelling of 136810638 in words is "one hundred thirty-six million, eight hundred ten thousand, six hundred thirty-eight".