285655887 has 24 divisors (see below), whose sum is σ = 465650640. Its totient is φ = 167153280.

The previous prime is 285655859. The next prime is 285655927. The reversal of 285655887 is 788556582.

It is a happy number.

285655887 is a `hidden beast` number, since 2 + 8 + 5 + 6 + 558 + 87 = 666.

It is not a de Polignac number, because 285655887 - 2⁷ = 285655759 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285655807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46878 + ... + 52619.

It is an arithmetic number, because the mean of its divisors is an integer number (19402110).

Almost surely, 2^285655887 is an apocalyptic number.

285655887 is a deficient number, since it is larger than the sum of its proper divisors (179994753).

285655887 is a wasteful number, since it uses less digits than its factorization.

285655887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99543 (or 99540 counting only the distinct ones).

The product of its digits is 5376000, while the sum is 54.

The square root of 285655887 is about 16901.3575490255. The cubic root of 285655887 is about 658.5888790254.

The spelling of 285655887 in words is "two hundred eighty-five million, six hundred fifty-five thousand, eight hundred eighty-seven".