28005025387 has 2 divisors, whose sum is σ = 28005025388. Its totient is φ = 28005025386.

The previous prime is 28005025313. The next prime is 28005025403. The reversal of 28005025387 is 78352050082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28005025387 - 2²⁷ = 27870807659 is a prime.

It is not a weakly prime, because it can be changed into another prime (28005025187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14002512693 + 14002512694.

It is an arithmetic number, because the mean of its divisors is an integer number (14002512694).

Almost surely, 2^28005025387 is an apocalyptic number.

28005025387 is a deficient number, since it is larger than the sum of its proper divisors (1).

28005025387 is an equidigital number, since it uses as much as digits as its factorization.

28005025387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 28005025387 in words is "twenty-eight billion, five million, twenty-five thousand, three hundred eighty-seven".