136678788 has 54 divisors (see below), whose sum is σ = 361218494. Its totient is φ = 43572672.

The previous prime is 136678757. The next prime is 136678831. The reversal of 136678788 is 887876631.

It can be written as a sum of positive squares in only one way, i.e., 134374464 + 2304324 = 11592^2 + 1518^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15456 + ... + 22632.

Almost surely, 2^136678788 is an apocalyptic number.

136678788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136678788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180609247).

136678788 is an abundant number, since it is smaller than the sum of its proper divisors (224539706).

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

136678788 is a wasteful number, since it uses less digits than its factorization.

136678788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7233 (or 7205 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 136678788 is about 11690.9703617792. The cubic root of 136678788 is about 515.1104648830.

The spelling of 136678788 in words is "one hundred thirty-six million, six hundred seventy-eight thousand, seven hundred eighty-eight".