288393949 has 4 divisors (see below), whose sum is σ = 288489820. Its totient is φ = 288298080.

The previous prime is 288393907. The next prime is 288393983. The reversal of 288393949 is 949393882.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 949393882 = 2 ⋅474696941.

It can be written as a sum of positive squares in 2 ways, for example, as 50154724 + 238239225 = 7082^2 + 15435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-288393949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 288393949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288393449) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 43272 + ... + 49489.

It is an arithmetic number, because the mean of its divisors is an integer number (72122455).

Almost surely, 2^288393949 is an apocalyptic number.

It is an amenable number.

288393949 is a deficient number, since it is larger than the sum of its proper divisors (95871).

288393949 is an equidigital number, since it uses as much as digits as its factorization.

288393949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95870.

The product of its digits is 3359232, while the sum is 55.

The square root of 288393949 is about 16982.1656157276. The cubic root of 288393949 is about 660.6864216030.

The spelling of 288393949 in words is "two hundred eighty-eight million, three hundred ninety-three thousand, nine hundred forty-nine".