287385855 has 16 divisors (see below), whose sum is σ = 460055904. Its totient is φ = 153192960.

The previous prime is 287385829. The next prime is 287385863. The reversal of 287385855 is 558583782.

It is a happy number.

It is not a de Polignac number, because 287385855 - 2¹⁰ = 287384831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 287385798 and 287385807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35595 + ... + 42915.

It is an arithmetic number, because the mean of its divisors is an integer number (28753494).

Almost surely, 2^287385855 is an apocalyptic number.

287385855 is a deficient number, since it is larger than the sum of its proper divisors (172670049).

287385855 is a wasteful number, since it uses less digits than its factorization.

287385855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9946.

The product of its digits is 2688000, while the sum is 51.

The square root of 287385855 is about 16952.4586712370. The cubic root of 287385855 is about 659.9157031916.

The spelling of 287385855 in words is "two hundred eighty-seven million, three hundred eighty-five thousand, eight hundred fifty-five".