285144428 has 12 divisors (see below), whose sum is σ = 500163552. Its totient is φ = 142240560.

The previous prime is 285144421. The next prime is 285144467. The reversal of 285144428 is 824441582.

It is a junction number, because it is equal to n+sod(n) for n = 285144391 and 285144400.

It is not an unprimeable number, because it can be changed into a prime (285144421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80975 + ... + 84422.

It is an arithmetic number, because the mean of its divisors is an integer number (41680296).

Almost surely, 2^285144428 is an apocalyptic number.

It is an amenable number.

285144428 is a deficient number, since it is larger than the sum of its proper divisors (215019124).

285144428 is a wasteful number, since it uses less digits than its factorization.

285144428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165832 (or 165830 counting only the distinct ones).

The product of its digits is 81920, while the sum is 38.

The square root of 285144428 is about 16886.2200625244. The cubic root of 285144428 is about 658.1955824519.

The spelling of 285144428 in words is "two hundred eighty-five million, one hundred forty-four thousand, four hundred twenty-eight".