136408738 has 4 divisors (see below), whose sum is σ = 204613110. Its totient is φ = 68204368.

The previous prime is 136408687. The next prime is 136408739. The reversal of 136408738 is 837804631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 128663649 + 7745089 = 11343^2 + 2783^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 136408738.

It is not an unprimeable number, because it can be changed into a prime (136408739) 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 as a sum of consecutive naturals, namely, 34102183 + ... + 34102186.

Almost surely, 2^136408738 is an apocalyptic number.

136408738 is a deficient number, since it is larger than the sum of its proper divisors (68204372).

136408738 is an equidigital number, since it uses as much as digits as its factorization.

136408738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68204371.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 136408738 is about 11679.4151394665. The cubic root of 136408738 is about 514.7709893903.

The spelling of 136408738 in words is "one hundred thirty-six million, four hundred eight thousand, seven hundred thirty-eight".