285402028 has 12 divisors (see below), whose sum is σ = 503047720. Its totient is φ = 141674112.

The previous prime is 285402023. The next prime is 285402049. The reversal of 285402028 is 820204582.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (285402023) 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, 256101 + ... + 257212.

Almost surely, 2^285402028 is an apocalyptic number.

It is an amenable number.

285402028 is a deficient number, since it is larger than the sum of its proper divisors (217645692).

285402028 is a wasteful number, since it uses less digits than its factorization.

285402028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513456 (or 513454 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 285402028 is about 16893.8458617332. The cubic root of 285402028 is about 658.3937278283.

The spelling of 285402028 in words is "two hundred eighty-five million, four hundred two thousand, twenty-eight".