136810728 has 32 divisors (see below), whose sum is σ = 380030400. Its totient is φ = 45603504.

The previous prime is 136810703. The next prime is 136810741. The reversal of 136810728 is 827018631.

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 = 136810692 and 136810701.

It is an unprimeable number.

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, 316476 + ... + 316907.

It is an arithmetic number, because the mean of its divisors is an integer number (11875950).

Almost surely, 2^136810728 is an apocalyptic number.

136810728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

136810728 is an abundant number, since it is smaller than the sum of its proper divisors (243219672).

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

136810728 is a wasteful number, since it uses less digits than its factorization.

136810728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633398 (or 633388 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 136810728 is about 11696.6118171033. The cubic root of 136810728 is about 515.2761619366.

The spelling of 136810728 in words is "one hundred thirty-six million, eight hundred ten thousand, seven hundred twenty-eight".