28149474839 has 2 divisors, whose sum is σ = 28149474840. Its totient is φ = 28149474838.

The previous prime is 28149474781. The next prime is 28149474889. The reversal of 28149474839 is 93847494182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28149474839 - 2²⁰ = 28148426263 is a prime.

It is a super-2 number, since 2×28149474839² (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 (28149474889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14074737419 + 14074737420.

It is an arithmetic number, because the mean of its divisors is an integer number (14074737420).

Almost surely, 2^28149474839 is an apocalyptic number.

28149474839 is a deficient number, since it is larger than the sum of its proper divisors (1).

28149474839 is an equidigital number, since it uses as much as digits as its factorization.

28149474839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13934592, while the sum is 59.

The spelling of 28149474839 in words is "twenty-eight billion, one hundred forty-nine million, four hundred seventy-four thousand, eight hundred thirty-nine".