288427391 has 16 divisors (see below), whose sum is σ = 354370560. Its totient is φ = 229223520.

The previous prime is 288427387. The next prime is 288427393. The reversal of 288427391 is 193724882.

It is a cyclic number.

It is not a de Polignac number, because 288427391 - 2² = 288427387 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288427393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16820 + ... + 29321.

It is an arithmetic number, because the mean of its divisors is an integer number (22148160).

Almost surely, 2^288427391 is an apocalyptic number.

288427391 is a deficient number, since it is larger than the sum of its proper divisors (65943169).

288427391 is a wasteful number, since it uses less digits than its factorization.

288427391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46214.

The product of its digits is 193536, while the sum is 44.

The square root of 288427391 is about 16983.1502083683. The cubic root of 288427391 is about 660.7119582245.

The spelling of 288427391 in words is "two hundred eighty-eight million, four hundred twenty-seven thousand, three hundred ninety-one".