28330478285 has 8 divisors (see below), whose sum is σ = 34333174296. Its totient is φ = 22439982400.

The previous prime is 28330478279. The next prime is 28330478287. The reversal of 28330478285 is 58287403382.

It can be written as a sum of positive squares in 4 ways, for example, as 18134931556 + 10195546729 = 134666^2 + 100973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28330478285 - 2⁶ = 28330478221 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 (28330478287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28049474 + ... + 28050483.

It is an arithmetic number, because the mean of its divisors is an integer number (4291646787).

Almost surely, 2^28330478285 is an apocalyptic number.

It is an amenable number.

28330478285 is a deficient number, since it is larger than the sum of its proper divisors (6002696011).

28330478285 is a wasteful number, since it uses less digits than its factorization.

28330478285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56100063.

The product of its (nonzero) digits is 2580480, while the sum is 50.

The spelling of 28330478285 in words is "twenty-eight billion, three hundred thirty million, four hundred seventy-eight thousand, two hundred eighty-five".