136856688 has 80 divisors (see below), whose sum is σ = 365039136. Its totient is φ = 44154880.

The previous prime is 136856683. The next prime is 136856719. The reversal of 136856688 is 886658631.

It is a self number, because there is not a number n which added to its sum of digits gives 136856688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136856683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387520 + ... + 387872.

Almost surely, 2^136856688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136856688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182519568).

136856688 is an abundant number, since it is smaller than the sum of its proper divisors (228182448).

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

136856688 is a wasteful number, since it uses less digits than its factorization.

136856688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 596 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The square root of 136856688 is about 11698.5763236387. The cubic root of 136856688 is about 515.3338558551. Note that the first 3 decimals are identical.

The spelling of 136856688 in words is "one hundred thirty-six million, eight hundred fifty-six thousand, six hundred eighty-eight".