28374728731 has 2 divisors, whose sum is σ = 28374728732. Its totient is φ = 28374728730.

The previous prime is 28374728677. The next prime is 28374728741. The reversal of 28374728731 is 13782747382.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28374728731 is a prime.

It is a super-2 number, since 2×28374728731² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28374728741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14187364365 + 14187364366.

It is an arithmetic number, because the mean of its divisors is an integer number (14187364366).

Almost surely, 2^28374728731 is an apocalyptic number.

28374728731 is a deficient number, since it is larger than the sum of its proper divisors (1).

28374728731 is an equidigital number, since it uses as much as digits as its factorization.

28374728731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 52.

The spelling of 28374728731 in words is "twenty-eight billion, three hundred seventy-four million, seven hundred twenty-eight thousand, seven hundred thirty-one".