8285440 has 36 divisors (see below), whose sum is σ = 19849284. Its totient is φ = 3313664.

The previous prime is 8285411. The next prime is 8285461. The reversal of 8285440 is 445828.

It can be written as a sum of positive squares in 2 ways, for example, as 2214144 + 6071296 = 1488^2 + 2464^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1957 + ... + 4516.

It is an arithmetic number, because the mean of its divisors is an integer number (551369).

Almost surely, 2^8285440 is an apocalyptic number.

8285440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8285440 is an abundant number, since it is smaller than the sum of its proper divisors (11563844).

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

8285440 is an equidigital number, since it uses as much as digits as its factorization.

8285440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6494 (or 6480 counting only the distinct ones).

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

The square root of 8285440 is about 2878.4440241214. Note that the first 3 decimals coincide. The cubic root of 8285440 is about 202.3509241679.

The spelling of 8285440 in words is "eight million, two hundred eighty-five thousand, four hundred forty".