288166465 has 4 divisors (see below), whose sum is σ = 345799764. Its totient is φ = 230533168.

The previous prime is 288166457. The next prime is 288166469. The reversal of 288166465 is 564661882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564661882 = 2 ⋅282330941.

It can be written as a sum of positive squares in 2 ways, for example, as 34433424 + 253733041 = 5868^2 + 15929^2 .

It is a cyclic number.

It is not a de Polignac number, because 288166465 - 2³ = 288166457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (288166469) 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, 28816642 + ... + 28816651.

It is an arithmetic number, because the mean of its divisors is an integer number (86449941).

Almost surely, 2^288166465 is an apocalyptic number.

It is an amenable number.

288166465 is a deficient number, since it is larger than the sum of its proper divisors (57633299).

288166465 is an equidigital number, since it uses as much as digits as its factorization.

288166465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57633298.

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

The square root of 288166465 is about 16975.4665620713. The cubic root of 288166465 is about 660.5126603004.

It can be divided in two parts, 288 and 166465, that added together give a triangular number (166753 = T₅₇₇).

The spelling of 288166465 in words is "two hundred eighty-eight million, one hundred sixty-six thousand, four hundred sixty-five".