288390865 has 16 divisors (see below), whose sum is σ = 396990720. Its totient is φ = 197012160.

The previous prime is 288390863. The next prime is 288390871. The reversal of 288390865 is 568093882.

It is not a de Polignac number, because 288390865 - 2¹ = 288390863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (288390863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5901 + ... + 24730.

It is an arithmetic number, because the mean of its divisors is an integer number (24811920).

Almost surely, 2^288390865 is an apocalyptic number.

It is an amenable number.

288390865 is a deficient number, since it is larger than the sum of its proper divisors (108599855).

288390865 is a wasteful number, since it uses less digits than its factorization.

288390865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30912.

The product of its (nonzero) digits is 829440, while the sum is 49.

The square root of 288390865 is about 16982.0748143447. The cubic root of 288390865 is about 660.6840665326.

The spelling of 288390865 in words is "two hundred eighty-eight million, three hundred ninety thousand, eight hundred sixty-five".