136831720 has 16 divisors (see below), whose sum is σ = 307871460. Its totient is φ = 54732672.

The previous prime is 136831703. The next prime is 136831753. The reversal of 136831720 is 27138631.

It can be written as a sum of positive squares in 2 ways, for example, as 136095556 + 736164 = 11666^2 + 858^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1710357 + ... + 1710436.

Almost surely, 2^136831720 is an apocalyptic number.

136831720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136831720 is an abundant number, since it is smaller than the sum of its proper divisors (171039740).

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

136831720 is a wasteful number, since it uses less digits than its factorization.

136831720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420804 (or 3420800 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 136831720 is about 11697.5091365641. The cubic root of 136831720 is about 515.3025149479.

The spelling of 136831720 in words is "one hundred thirty-six million, eight hundred thirty-one thousand, seven hundred twenty".