285079320 has 48 divisors (see below), whose sum is σ = 926508960. Its totient is φ = 76021056.

The previous prime is 285079283. The next prime is 285079349. The reversal of 285079320 is 23970582.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 395584 + ... + 396303.

It is an arithmetic number, because the mean of its divisors is an integer number (19302270).

Almost surely, 2^285079320 is an apocalyptic number.

285079320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285079320 is an abundant number, since it is smaller than the sum of its proper divisors (641429640).

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

285079320 is a wasteful number, since it uses less digits than its factorization.

285079320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791904 (or 791897 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 285079320 is about 16884.2921083473. The cubic root of 285079320 is about 658.1454826243.

The spelling of 285079320 in words is "two hundred eighty-five million, seventy-nine thousand, three hundred twenty".