288465409 has 4 divisors (see below), whose sum is σ = 288499716. Its totient is φ = 288431104.

The previous prime is 288465389. The next prime is 288465427. The reversal of 288465409 is 904564882.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 196784784 + 91680625 = 14028^2 + 9575^2 .

It is a cyclic number.

It is not a de Polignac number, because 288465409 - 2²⁵ = 254910977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (288460409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4977 + ... + 24529.

It is an arithmetic number, because the mean of its divisors is an integer number (72124929).

Almost surely, 2^288465409 is an apocalyptic number.

It is an amenable number.

288465409 is a deficient number, since it is larger than the sum of its proper divisors (34307).

288465409 is a wasteful number, since it uses less digits than its factorization.

288465409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34306.

The product of its (nonzero) digits is 552960, while the sum is 46.

The square root of 288465409 is about 16984.2694573538. The cubic root of 288465409 is about 660.7409867246.

The spelling of 288465409 in words is "two hundred eighty-eight million, four hundred sixty-five thousand, four hundred nine".