136777808 has 40 divisors (see below), whose sum is σ = 282928320. Its totient is φ = 63866880.

The previous prime is 136777787. The next prime is 136777811. The reversal of 136777808 is 808777631.

It is a super-2 number, since 2×136777808² = 37416337522569728, which contains 22 as substring.

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, 18416 + ... + 24752.

It is an arithmetic number, because the mean of its divisors is an integer number (7073208).

Almost surely, 2^136777808 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 136777808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141464160).

136777808 is an abundant number, since it is smaller than the sum of its proper divisors (146150512).

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

136777808 is a wasteful number, since it uses less digits than its factorization.

136777808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6435 (or 6429 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 47.

The square root of 136777808 is about 11695.2044873102. The cubic root of 136777808 is about 515.2348292812.

The spelling of 136777808 in words is "one hundred thirty-six million, seven hundred seventy-seven thousand, eight hundred eight".