288280645 has 8 divisors (see below), whose sum is σ = 366286104. Its totient is φ = 217058304.

The previous prime is 288280637. The next prime is 288280651. The reversal of 288280645 is 546082882.

It can be written as a sum of positive squares in 4 ways, for example, as 84162276 + 204118369 = 9174^2 + 14287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 288280645 - 2³ = 288280637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1695684 + ... + 1695853.

It is an arithmetic number, because the mean of its divisors is an integer number (45785763).

Almost surely, 2^288280645 is an apocalyptic number.

It is an amenable number.

288280645 is a deficient number, since it is larger than the sum of its proper divisors (78005459).

288280645 is a wasteful number, since it uses less digits than its factorization.

288280645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391559.

The product of its (nonzero) digits is 245760, while the sum is 43.

The square root of 288280645 is about 16978.8293177121. The cubic root of 288280645 is about 660.5998869396.

The spelling of 288280645 in words is "two hundred eighty-eight million, two hundred eighty thousand, six hundred forty-five".