287006505 has 16 divisors (see below), whose sum is σ = 462517440. Its totient is φ = 151967808.

The previous prime is 287006479. The next prime is 287006509. The reversal of 287006505 is 505600782.

It is a happy number.

It is not a de Polignac number, because 287006505 - 2⁶ = 287006441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (287006509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66742 + ... + 70911.

It is an arithmetic number, because the mean of its divisors is an integer number (28907340).

Almost surely, 2^287006505 is an apocalyptic number.

It is an amenable number.

287006505 is a deficient number, since it is larger than the sum of its proper divisors (175510935).

287006505 is a wasteful number, since it uses less digits than its factorization.

287006505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137800.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 287006505 is about 16941.2663340141. The cubic root of 287006505 is about 659.6252119144.

The spelling of 287006505 in words is "two hundred eighty-seven million, six thousand, five hundred five".