28736275837 has 2 divisors, whose sum is σ = 28736275838. Its totient is φ = 28736275836.

The previous prime is 28736275823. The next prime is 28736275921. The reversal of 28736275837 is 73857263782.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19886358361 + 8849917476 = 141019^2 + 94074^2 .

It is a cyclic number.

It is not a de Polignac number, because 28736275837 - 2⁷ = 28736275709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28736275817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14368137918 + 14368137919.

It is an arithmetic number, because the mean of its divisors is an integer number (14368137919).

Almost surely, 2^28736275837 is an apocalyptic number.

It is an amenable number.

28736275837 is a deficient number, since it is larger than the sum of its proper divisors (1).

28736275837 is an equidigital number, since it uses as much as digits as its factorization.

28736275837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23708160, while the sum is 58.

The spelling of 28736275837 in words is "twenty-eight billion, seven hundred thirty-six million, two hundred seventy-five thousand, eight hundred thirty-seven".