136209940 has 12 divisors (see below), whose sum is σ = 286040916. Its totient is φ = 54483968.

The previous prime is 136209907. The next prime is 136209949. The reversal of 136209940 is 49902631.

It can be written as a sum of positive squares in 2 ways, for example, as 98485776 + 37724164 = 9924^2 + 6142^2 .

It is a junction number, because it is equal to n+sod(n) for n = 136209896 and 136209905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136209949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3405229 + ... + 3405268.

It is an arithmetic number, because the mean of its divisors is an integer number (23836743).

Almost surely, 2^136209940 is an apocalyptic number.

136209940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136209940 is an abundant number, since it is smaller than the sum of its proper divisors (149830976).

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

136209940 is a wasteful number, since it uses less digits than its factorization.

136209940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6810506 (or 6810504 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 136209940 is about 11670.9014219125. The cubic root of 136209940 is about 514.5207972143.

The spelling of 136209940 in words is "one hundred thirty-six million, two hundred nine thousand, nine hundred forty".