28255525387 has 2 divisors, whose sum is σ = 28255525388. Its totient is φ = 28255525386.

The previous prime is 28255525297. The next prime is 28255525409. The reversal of 28255525387 is 78352555282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28255525387 - 2¹⁵ = 28255492619 is a prime.

It is not a weakly prime, because it can be changed into another prime (28255525187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14127762693 + 14127762694.

It is an arithmetic number, because the mean of its divisors is an integer number (14127762694).

Almost surely, 2^28255525387 is an apocalyptic number.

28255525387 is a deficient number, since it is larger than the sum of its proper divisors (1).

28255525387 is an equidigital number, since it uses as much as digits as its factorization.

28255525387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720000, while the sum is 52.

The spelling of 28255525387 in words is "twenty-eight billion, two hundred fifty-five million, five hundred twenty-five thousand, three hundred eighty-seven".