136487680 has 72 divisors (see below), whose sum is σ = 373659552. Its totient is φ = 46792704.

The previous prime is 136487657. The next prime is 136487693. The reversal of 136487680 is 86784631.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344 + ... + 16576.

It is an arithmetic number, because the mean of its divisors is an integer number (5189716).

Almost surely, 2^136487680 is an apocalyptic number.

136487680 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 136487680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186829776).

136487680 is an abundant number, since it is smaller than the sum of its proper divisors (237171872).

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

136487680 is an equidigital number, since it uses as much as digits as its factorization.

136487680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15261 (or 15247 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 136487680 is about 11682.7941863237. The cubic root of 136487680 is about 514.8702724115.

The spelling of 136487680 in words is "one hundred thirty-six million, four hundred eighty-seven thousand, six hundred eighty".