28074494731 has 2 divisors, whose sum is σ = 28074494732. Its totient is φ = 28074494730.

The previous prime is 28074494713. The next prime is 28074494741. The reversal of 28074494731 is 13749447082.

Together with previous prime (28074494713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28074494731 - 2⁹ = 28074494219 is a prime.

It is a super-2 number, since 2×28074494731² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28074494741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14037247365 + 14037247366.

It is an arithmetic number, because the mean of its divisors is an integer number (14037247366).

Almost surely, 2^28074494731 is an apocalyptic number.

28074494731 is a deficient number, since it is larger than the sum of its proper divisors (1).

28074494731 is an equidigital number, since it uses as much as digits as its factorization.

28074494731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 28074494731 in words is "twenty-eight billion, seventy-four million, four hundred ninety-four thousand, seven hundred thirty-one".