136220436 has 72 divisors (see below), whose sum is σ = 377814528. Its totient is φ = 41040000.

The previous prime is 136220393. The next prime is 136220437. The reversal of 136220436 is 634022631.

136220436 is a `hidden beast` number, since 1 + 3 + 6 + 220 + 436 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136220437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74736 + ... + 76536.

It is an arithmetic number, because the mean of its divisors is an integer number (5247424).

Almost surely, 2^136220436 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 136220436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188907264).

136220436 is an abundant number, since it is smaller than the sum of its proper divisors (241594092).

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

136220436 is a wasteful number, since it uses less digits than its factorization.

136220436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013 (or 2008 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 136220436 is about 11671.3510786027. The cubic root of 136220436 is about 514.5340127735.

The spelling of 136220436 in words is "one hundred thirty-six million, two hundred twenty thousand, four hundred thirty-six".