285974990 has 16 divisors (see below), whose sum is σ = 588291552. Its totient is φ = 98048544.

The previous prime is 285974987. The next prime is 285975013. The reversal of 285974990 is 99479582.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2042609 + ... + 2042748.

It is an arithmetic number, because the mean of its divisors is an integer number (36768222).

Almost surely, 2^285974990 is an apocalyptic number.

285974990 is an abundant number, since it is smaller than the sum of its proper divisors (302316562).

285974990 is a wasteful number, since it uses less digits than its factorization.

285974990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4085371.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The square root of 285974990 is about 16910.7950729704. The cubic root of 285974990 is about 658.8340218589.

The spelling of 285974990 in words is "two hundred eighty-five million, nine hundred seventy-four thousand, nine hundred ninety".