136818540 has 36 divisors (see below), whose sum is σ = 415016784. Its totient is φ = 36484896.

The previous prime is 136818527. The next prime is 136818553. The reversal of 136818540 is 45818631.

136818540 is a `hidden beast` number, since 1 + 36 + 81 + 8 + 540 = 666.

It is an interprime number because it is at equal distance from previous prime (136818527) and next prime (136818553).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 136818495 and 136818504.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 379872 + ... + 380231.

It is an arithmetic number, because the mean of its divisors is an integer number (11528244).

Almost surely, 2^136818540 is an apocalyptic number.

136818540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136818540 is an abundant number, since it is smaller than the sum of its proper divisors (278198244).

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

136818540 is a wasteful number, since it uses less digits than its factorization.

136818540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760118 (or 760113 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 136818540 is about 11696.9457551961. The cubic root of 136818540 is about 515.2859693077.

Subtracting from 136818540 its reverse (45818631), we obtain a palindrome (90999909).

The spelling of 136818540 in words is "one hundred thirty-six million, eight hundred eighteen thousand, five hundred forty".