285647445 has 32 divisors (see below), whose sum is σ = 516157440. Its totient is φ = 149843520.

The previous prime is 285647431. The next prime is 285647449. The reversal of 285647445 is 544746582.

It is not a de Polignac number, because 285647445 - 2⁶ = 285647381 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 285647445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285647449) 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 31 ways as a sum of consecutive naturals, for example, 9109 + ... + 25578.

It is an arithmetic number, because the mean of its divisors is an integer number (16129920).

Almost surely, 2^285647445 is an apocalyptic number.

It is an amenable number.

285647445 is a deficient number, since it is larger than the sum of its proper divisors (230509995).

285647445 is a wasteful number, since it uses less digits than its factorization.

285647445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34762 (or 34756 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 45.

The square root of 285647445 is about 16901.1078039281. The cubic root of 285647445 is about 658.5823911935.

The spelling of 285647445 in words is "two hundred eighty-five million, six hundred forty-seven thousand, four hundred forty-five".