285717428 has 12 divisors (see below), whose sum is σ = 501786852. Its totient is φ = 142349760.

The previous prime is 285717407. The next prime is 285717451. The reversal of 285717428 is 824717582.

It can be written as a sum of positive squares in 2 ways, for example, as 63170704 + 222546724 = 7948^2 + 14918^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125975 + ... + 128222.

It is an arithmetic number, because the mean of its divisors is an integer number (41815571).

Almost surely, 2^285717428 is an apocalyptic number.

It is an amenable number.

285717428 is a deficient number, since it is larger than the sum of its proper divisors (216069424).

285717428 is a wasteful number, since it uses less digits than its factorization.

285717428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254482 (or 254480 counting only the distinct ones).

The product of its digits is 250880, while the sum is 44.

The square root of 285717428 is about 16903.1780443797. The cubic root of 285717428 is about 658.6361705508.

The spelling of 285717428 in words is "two hundred eighty-five million, seven hundred seventeen thousand, four hundred twenty-eight".