28078756223 has 8 divisors (see below), whose sum is σ = 32142021792. Its totient is φ = 24028494336.

The previous prime is 28078756193. The next prime is 28078756241. The reversal of 28078756223 is 32265787082.

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

It is not a de Polignac number, because 28078756223 - 2¹⁶ = 28078690687 is a prime.

It is a super-2 number, since 2×28078756223² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28078756253) 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, 3246290 + ... + 3254927.

It is an arithmetic number, because the mean of its divisors is an integer number (4017752724).

Almost surely, 2^28078756223 is an apocalyptic number.

28078756223 is a deficient number, since it is larger than the sum of its proper divisors (4063265569).

28078756223 is an equidigital number, since it uses as much as digits as its factorization.

28078756223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6501841.

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 28078756223 in words is "twenty-eight billion, seventy-eight million, seven hundred fifty-six thousand, two hundred twenty-three".