283264640 has 32 divisors (see below), whose sum is σ = 677181060. Its totient is φ = 113305600.

The previous prime is 283264633. The next prime is 283264669. The reversal of 283264640 is 46462382.

It can be written as a sum of positive squares in 2 ways, for example, as 240126016 + 43138624 = 15496^2 + 6568^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 283264640.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220661 + ... + 221940.

Almost surely, 2^283264640 is an apocalyptic number.

283264640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

283264640 is an abundant number, since it is smaller than the sum of its proper divisors (393916420).

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

283264640 is an equidigital number, since it uses as much as digits as its factorization.

283264640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442620 (or 442608 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 283264640 is about 16830.4676108538. The cubic root of 283264640 is about 656.7460281259.

The spelling of 283264640 in words is "two hundred eighty-three million, two hundred sixty-four thousand, six hundred forty".