28078751143 has 4 divisors (see below), whose sum is σ = 28130083960. Its totient is φ = 28027418328.

The previous prime is 28078751119. The next prime is 28078751147. The reversal of 28078751143 is 34115787082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28078751143 - 2⁵ = 28078751111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28078751093 and 28078751102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28078751147) 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, 25665588 + ... + 25666681.

It is an arithmetic number, because the mean of its divisors is an integer number (7032520990).

Almost surely, 2^28078751143 is an apocalyptic number.

28078751143 is a deficient number, since it is larger than the sum of its proper divisors (51332817).

28078751143 is an equidigital number, since it uses as much as digits as its factorization.

28078751143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51332816.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 28078751143 in words is "twenty-eight billion, seventy-eight million, seven hundred fifty-one thousand, one hundred forty-three".