288640485 has 24 divisors (see below), whose sum is σ = 571783680. Its totient is φ = 131949792.

The previous prime is 288640477. The next prime is 288640487. The reversal of 288640485 is 584046882.

It is not a de Polignac number, because 288640485 - 2³ = 288640477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 288640485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288640487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 457845 + ... + 458474.

It is an arithmetic number, because the mean of its divisors is an integer number (23824320).

Almost surely, 2^288640485 is an apocalyptic number.

It is an amenable number.

288640485 is a deficient number, since it is larger than the sum of its proper divisors (283143195).

288640485 is a wasteful number, since it uses less digits than its factorization.

288640485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916337 (or 916334 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 45.

The square root of 288640485 is about 16989.4227388690. The cubic root of 288640485 is about 660.8746324355.

The spelling of 288640485 in words is "two hundred eighty-eight million, six hundred forty thousand, four hundred eighty-five".