28788243 has 32 divisors (see below), whose sum is σ = 43794432. Its totient is φ = 16663200.

The previous prime is 28788239. The next prime is 28788247. The reversal of 28788243 is 34288782.

It is an interprime number because it is at equal distance from previous prime (28788239) and next prime (28788247).

It is not a de Polignac number, because 28788243 - 2² = 28788239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28788195 and 28788204.

It is not an unprimeable number, because it can be changed into a prime (28788247) 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 31 ways as a sum of consecutive naturals, for example, 109330 + ... + 109592.

It is an arithmetic number, because the mean of its divisors is an integer number (1368576).

Almost surely, 2^28788243 is an apocalyptic number.

28788243 is a deficient number, since it is larger than the sum of its proper divisors (15006189).

28788243 is a wasteful number, since it uses less digits than its factorization.

28788243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415.

The product of its digits is 172032, while the sum is 42.

The square root of 28788243 is about 5365.4676403833. The cubic root of 28788243 is about 306.4820566322.

The spelling of 28788243 in words is "twenty-eight million, seven hundred eighty-eight thousand, two hundred forty-three".