288072749 has 4 divisors (see below), whose sum is σ = 288845436. Its totient is φ = 287300064.

The previous prime is 288072727. The next prime is 288072791. The reversal of 288072749 is 947270882.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 168870025 + 119202724 = 12995^2 + 10918^2 .

It is a cyclic number.

It is not a de Polignac number, because 288072749 - 2²⁴ = 271295533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288072709) 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, 385784 + ... + 386529.

It is an arithmetic number, because the mean of its divisors is an integer number (72211359).

Almost surely, 2^288072749 is an apocalyptic number.

It is an amenable number.

288072749 is a deficient number, since it is larger than the sum of its proper divisors (772687).

288072749 is an equidigital number, since it uses as much as digits as its factorization.

288072749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772686.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 288072749 is about 16972.7060011066. The cubic root of 288072749 is about 660.4410497054.

The spelling of 288072749 in words is "two hundred eighty-eight million, seventy-two thousand, seven hundred forty-nine".