285320490 has 64 divisors (see below), whose sum is σ = 842800896. Its totient is φ = 60198912.

The previous prime is 285320479. The next prime is 285320491. The reversal of 285320490 is 94023582.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (285320491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49527 + ... + 54986.

It is an arithmetic number, because the mean of its divisors is an integer number (13168764).

Almost surely, 2^285320490 is an apocalyptic number.

285320490 is an abundant number, since it is smaller than the sum of its proper divisors (557480406).

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

285320490 is a wasteful number, since it uses less digits than its factorization.

285320490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104543.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 285320490 is about 16891.4324436976. The cubic root of 285320490 is about 658.3310218723.

The spelling of 285320490 in words is "two hundred eighty-five million, three hundred twenty thousand, four hundred ninety".