136668340 has 24 divisors (see below), whose sum is σ = 287642880. Its totient is φ = 54545568.

The previous prime is 136668317. The next prime is 136668347. The reversal of 136668340 is 43866631.

It is a self number, because there is not a number n which added to its sum of digits gives 136668340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136668347) 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 7 ways as a sum of consecutive naturals, for example, 1881 + ... + 16639.

It is an arithmetic number, because the mean of its divisors is an integer number (11985120).

Almost surely, 2^136668340 is an apocalyptic number.

136668340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136668340 is an abundant number, since it is smaller than the sum of its proper divisors (150974540).

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

136668340 is a wasteful number, since it uses less digits than its factorization.

136668340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15231 (or 15229 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 136668340 is about 11690.5235126576. The cubic root of 136668340 is about 515.0973391904.

The spelling of 136668340 in words is "one hundred thirty-six million, six hundred sixty-eight thousand, three hundred forty".