136878688 has 48 divisors (see below), whose sum is σ = 278661600. Its totient is φ = 66134016.

The previous prime is 136878667. The next prime is 136878697. The reversal of 136878688 is 886878631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228213 + ... + 228811.

It is an arithmetic number, because the mean of its divisors is an integer number (5805450).

Almost surely, 2^136878688 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 136878688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139330800).

136878688 is an abundant number, since it is smaller than the sum of its proper divisors (141782912).

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

136878688 is a wasteful number, since it uses less digits than its factorization.

136878688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839 (or 831 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 55.

The square root of 136878688 is about 11699.5165712093. The cubic root of 136878688 is about 515.3614680421.

The spelling of 136878688 in words is "one hundred thirty-six million, eight hundred seventy-eight thousand, six hundred eighty-eight".