28014019639 has 2 divisors, whose sum is σ = 28014019640. Its totient is φ = 28014019638.

The previous prime is 28014019567. The next prime is 28014019651. The reversal of 28014019639 is 93691041082.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28014019639 - 2⁷ = 28014019511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28014019595 and 28014019604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28014019669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14007009819 + 14007009820.

It is an arithmetic number, because the mean of its divisors is an integer number (14007009820).

Almost surely, 2^28014019639 is an apocalyptic number.

28014019639 is a deficient number, since it is larger than the sum of its proper divisors (1).

28014019639 is an equidigital number, since it uses as much as digits as its factorization.

28014019639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 28014019639 in words is "twenty-eight billion, fourteen million, nineteen thousand, six hundred thirty-nine".