284490682640 has 40 divisors (see below), whose sum is σ = 663012034008. Its totient is φ = 113525959680.

The previous prime is 284490682639. The next prime is 284490682661. The reversal of 284490682640 is 46286094482.

It can be written as a sum of positive squares in 4 ways, for example, as 12828733696 + 271661948944 = 113264^2 + 521212^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 4189757 + ... + 4257116.

Almost surely, 2^284490682640 is an apocalyptic number.

284490682640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

284490682640 is an abundant number, since it is smaller than the sum of its proper divisors (378521351368).

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

284490682640 is a wasteful number, since it uses less digits than its factorization.

284490682640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8447307 (or 8447301 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 53.

The spelling of 284490682640 in words is "two hundred eighty-four billion, four hundred ninety million, six hundred eighty-two thousand, six hundred forty".