136780138 has 8 divisors (see below), whose sum is σ = 223822080. Its totient is φ = 62172780.

The previous prime is 136780129. The next prime is 136780139. The reversal of 136780138 is 831087631.

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

It is a junction number, because it is equal to n+sod(n) for n = 136780097 and 136780106.

It is not an unprimeable number, because it can be changed into a prime (136780139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3108618 + ... + 3108661.

It is an arithmetic number, because the mean of its divisors is an integer number (27977760).

Almost surely, 2^136780138 is an apocalyptic number.

136780138 is a deficient number, since it is larger than the sum of its proper divisors (87041942).

136780138 is a wasteful number, since it uses less digits than its factorization.

136780138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6217292.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 136780138 is about 11695.3041003644. The cubic root of 136780138 is about 515.2377549272.

The spelling of 136780138 in words is "one hundred thirty-six million, seven hundred eighty thousand, one hundred thirty-eight".