285263490 has 32 divisors (see below), whose sum is σ = 697553856. Its totient is φ = 74634560.

The previous prime is 285263467. The next prime is 285263497. The reversal of 285263490 is 94362582.

It is a happy number.

It is a super-3 number, since 3×285263490³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (285263497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88116 + ... + 91295.

It is an arithmetic number, because the mean of its divisors is an integer number (21798558).

Almost surely, 2^285263490 is an apocalyptic number.

285263490 is an abundant number, since it is smaller than the sum of its proper divisors (412290366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285263490 is a wasteful number, since it uses less digits than its factorization.

285263490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179474.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 285263490 is about 16889.7451135297. The cubic root of 285263490 is about 658.2871795164.

The spelling of 285263490 in words is "two hundred eighty-five million, two hundred sixty-three thousand, four hundred ninety".