136641240 has 192 divisors, whose sum is σ = 477640800. Its totient is φ = 33755136.

The previous prime is 136641221. The next prime is 136641251. The reversal of 136641240 is 42146631.

136641240 is a `hidden beast` number, since 13 + 6 + 641 + 2 + 4 + 0 = 666.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 507826 + ... + 508094.

Almost surely, 2^136641240 is an apocalyptic number.

136641240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136641240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238820400).

136641240 is an abundant number, since it is smaller than the sum of its proper divisors (340999560).

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

136641240 is a wasteful number, since it uses less digits than its factorization.

136641240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 136641240 is about 11689.3643967497. The cubic root of 136641240 is about 515.0632906789.

Adding to 136641240 its reverse (42146631), we get a palindrome (178787871).

The spelling of 136641240 in words is "one hundred thirty-six million, six hundred forty-one thousand, two hundred forty".