287861255 has 16 divisors (see below), whose sum is σ = 399004704. Its totient is φ = 197038080.

The previous prime is 287861251. The next prime is 287861269. The reversal of 287861255 is 552168782.

It is not a de Polignac number, because 287861255 - 2² = 287861251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287861251) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 153002 + ... + 154871.

It is an arithmetic number, because the mean of its divisors is an integer number (24937794).

Almost surely, 2^287861255 is an apocalyptic number.

287861255 is a deficient number, since it is larger than the sum of its proper divisors (111143449).

287861255 is a wasteful number, since it uses less digits than its factorization.

287861255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307906.

The product of its digits is 268800, while the sum is 44.

The square root of 287861255 is about 16966.4744422641. The cubic root of 287861255 is about 660.2793850836.

The spelling of 287861255 in words is "two hundred eighty-seven million, eight hundred sixty-one thousand, two hundred fifty-five".