285081885 has 24 divisors (see below), whose sum is σ = 539064864. Its totient is φ = 138221280.

The previous prime is 285081883. The next prime is 285081887. The reversal of 285081885 is 588180582.

It is an interprime number because it is at equal distance from previous prime (285081883) and next prime (285081887).

It is not a de Polignac number, because 285081885 - 2¹ = 285081883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 285081885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285081883) 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, 287467 + ... + 288456.

It is an arithmetic number, because the mean of its divisors is an integer number (22461036).

Almost surely, 2^285081885 is an apocalyptic number.

It is an amenable number.

285081885 is a deficient number, since it is larger than the sum of its proper divisors (253982979).

285081885 is a wasteful number, since it uses less digits than its factorization.

285081885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575945 (or 575942 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 45.

The square root of 285081885 is about 16884.3680663506. The cubic root of 285081885 is about 658.1474565055.

The spelling of 285081885 in words is "two hundred eighty-five million, eighty-one thousand, eight hundred eighty-five".