136649860 has 24 divisors (see below), whose sum is σ = 296222976. Its totient is φ = 52896480.

The previous prime is 136649857. The next prime is 136649861. The reversal of 136649860 is 68946631.

It is not an unprimeable number, because it can be changed into a prime (136649861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109582 + ... + 110821.

It is an arithmetic number, because the mean of its divisors is an integer number (12342624).

Almost surely, 2^136649860 is an apocalyptic number.

136649860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136649860 is an abundant number, since it is smaller than the sum of its proper divisors (159573116).

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

136649860 is a wasteful number, since it uses less digits than its factorization.

136649860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220443 (or 220441 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 136649860 is about 11689.7331021713. The cubic root of 136649860 is about 515.0741213578.

The spelling of 136649860 in words is "one hundred thirty-six million, six hundred forty-nine thousand, eight hundred sixty".