136280388 has 72 divisors (see below), whose sum is σ = 339413088. Its totient is φ = 42550272.

The previous prime is 136280387. The next prime is 136280467. The reversal of 136280388 is 883082631.

It is not an unprimeable number, because it can be changed into a prime (136280387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 706020 + ... + 706212.

Almost surely, 2^136280388 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 136280388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169706544).

136280388 is an abundant number, since it is smaller than the sum of its proper divisors (203132700).

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

136280388 is a wasteful number, since it uses less digits than its factorization.

136280388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 136280388 is about 11673.9191362627. The cubic root of 136280388 is about 514.6094855874.

The spelling of 136280388 in words is "one hundred thirty-six million, two hundred eighty thousand, three hundred eighty-eight".