288728423 has 4 divisors (see below), whose sum is σ = 288955800. Its totient is φ = 288501048.

The previous prime is 288728413. The next prime is 288728431. The reversal of 288728423 is 324827882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324827882 = 2 ⋅162413941.

It is a cyclic number.

It is not a de Polignac number, because 288728423 - 2²² = 284534119 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 (288728413) 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, 111773 + ... + 114326.

It is an arithmetic number, because the mean of its divisors is an integer number (72238950).

Almost surely, 2^288728423 is an apocalyptic number.

288728423 is a deficient number, since it is larger than the sum of its proper divisors (227377).

288728423 is a wasteful number, since it uses less digits than its factorization.

288728423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227376.

The product of its digits is 344064, while the sum is 44.

The square root of 288728423 is about 16992.0105637914. The cubic root of 288728423 is about 660.9417402456.

The spelling of 288728423 in words is "two hundred eighty-eight million, seven hundred twenty-eight thousand, four hundred twenty-three".