287680136 has 32 divisors (see below), whose sum is σ = 565185600. Its totient is φ = 137016000.

The previous prime is 287680123. The next prime is 287680147. The reversal of 287680136 is 631086782.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 287680093 and 287680102.

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, 43070 + ... + 49298.

It is an arithmetic number, because the mean of its divisors is an integer number (17662050).

Almost surely, 2^287680136 is an apocalyptic number.

It is an amenable number.

287680136 is a deficient number, since it is larger than the sum of its proper divisors (277505464).

287680136 is a wasteful number, since it uses less digits than its factorization.

287680136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6509 (or 6505 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 287680136 is about 16961.1360468572. The cubic root of 287680136 is about 660.1408759581.

The spelling of 287680136 in words is "two hundred eighty-seven million, six hundred eighty thousand, one hundred thirty-six".