28078575247 has 2 divisors, whose sum is σ = 28078575248. Its totient is φ = 28078575246.

The previous prime is 28078575233. The next prime is 28078575347. The reversal of 28078575247 is 74257587082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28078575247 - 2¹¹ = 28078573199 is a prime.

It is a super-2 number, since 2×28078575247² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28078575347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14039287623 + 14039287624.

It is an arithmetic number, because the mean of its divisors is an integer number (14039287624).

Almost surely, 2^28078575247 is an apocalyptic number.

28078575247 is a deficient number, since it is larger than the sum of its proper divisors (1).

28078575247 is an equidigital number, since it uses as much as digits as its factorization.

28078575247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8780800, while the sum is 55.

The spelling of 28078575247 in words is "twenty-eight billion, seventy-eight million, five hundred seventy-five thousand, two hundred forty-seven".