288397225 has 12 divisors (see below), whose sum is σ = 359895244. Its totient is φ = 229245120.

The previous prime is 288397211. The next prime is 288397271. The reversal of 288397225 is 522793882.

It can be written as a sum of positive squares in 6 ways, for example, as 4272489 + 284124736 = 2067^2 + 16856^2 .

It is not a de Polignac number, because 288397225 - 2²⁷ = 154179497 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32814 + ... + 40663.

Almost surely, 2^288397225 is an apocalyptic number.

288397225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

288397225 is a deficient number, since it is larger than the sum of its proper divisors (71498019).

288397225 is a wasteful number, since it uses less digits than its factorization.

288397225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73644 (or 73639 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 288397225 is about 16982.2620695831. The cubic root of 288397225 is about 660.6889232742.

The spelling of 288397225 in words is "two hundred eighty-eight million, three hundred ninety-seven thousand, two hundred twenty-five".