285428816 has 10 divisors (see below), whose sum is σ = 553018362. Its totient is φ = 142714400.

The previous prime is 285428789. The next prime is 285428879. The reversal of 285428816 is 618824582.

It can be written as a sum of positive squares in only one way, i.e., 162307600 + 123121216 = 12740^2 + 11096^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8919635 + ... + 8919666.

Almost surely, 2^285428816 is an apocalyptic number.

It is an amenable number.

285428816 is a deficient number, since it is larger than the sum of its proper divisors (267589546).

285428816 is a wasteful number, since it uses less digits than its factorization.

285428816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17839309 (or 17839303 counting only the distinct ones).

The product of its digits is 245760, while the sum is 44.

The square root of 285428816 is about 16894.6386762192. The cubic root of 285428816 is about 658.4143262563.

The spelling of 285428816 in words is "two hundred eighty-five million, four hundred twenty-eight thousand, eight hundred sixteen".