136220438 has 8 divisors (see below), whose sum is σ = 204389688. Its totient is φ = 68090544.

The previous prime is 136220437. The next prime is 136220489. The reversal of 136220438 is 834022631.

136220438 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 136220438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136220437) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1370 + ... + 16562.

It is an arithmetic number, because the mean of its divisors is an integer number (25548711).

Almost surely, 2^136220438 is an apocalyptic number.

136220438 is a deficient number, since it is larger than the sum of its proper divisors (68169250).

136220438 is a wasteful number, since it uses less digits than its factorization.

136220438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19678.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 136220438 is about 11671.3511642826. The cubic root of 136220438 is about 514.5340152916.

The spelling of 136220438 in words is "one hundred thirty-six million, two hundred twenty thousand, four hundred thirty-eight".