136136720 has 20 divisors (see below), whose sum is σ = 316518060. Its totient is φ = 54454656.

The previous prime is 136136719. The next prime is 136136723. The reversal of 136136720 is 27631631.

It can be written as a sum of positive squares in 2 ways, for example, as 28558336 + 107578384 = 5344^2 + 10372^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (136136723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850775 + ... + 850934.

It is an arithmetic number, because the mean of its divisors is an integer number (15825903).

Almost surely, 2^136136720 is an apocalyptic number.

136136720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136136720 is an abundant number, since it is smaller than the sum of its proper divisors (180381340).

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

136136720 is a wasteful number, since it uses less digits than its factorization.

136136720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701722 (or 1701716 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 136136720 is about 11667.7641388571. The cubic root of 136136720 is about 514.4285867015.

The spelling of 136136720 in words is "one hundred thirty-six million, one hundred thirty-six thousand, seven hundred twenty".