288065640 has 128 divisors (see below), whose sum is σ = 898744320. Its totient is φ = 73785600.

The previous prime is 288065633. The next prime is 288065651. The reversal of 288065640 is 46560882.

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 31 ways as a sum of consecutive naturals, for example, 784737 + ... + 785103.

It is an arithmetic number, because the mean of its divisors is an integer number (7021440).

Almost surely, 2^288065640 is an apocalyptic number.

288065640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 288065640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (449372160).

288065640 is an abundant number, since it is smaller than the sum of its proper divisors (610678680).

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

288065640 is a wasteful number, since it uses less digits than its factorization.

288065640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 288065640 is about 16972.4965753421. The cubic root of 288065640 is about 660.4356169180.

The spelling of 288065640 in words is "two hundred eighty-eight million, sixty-five thousand, six hundred forty".