28871604757 has 2 divisors, whose sum is σ = 28871604758. Its totient is φ = 28871604756.

The previous prime is 28871604737. The next prime is 28871604799. The reversal of 28871604757 is 75740617882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28698392836 + 173211921 = 169406^2 + 13161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28871604757 is a prime.

It is a super-2 number, since 2×28871604757² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28871604698 and 28871604707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28871604737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14435802378 + 14435802379.

It is an arithmetic number, because the mean of its divisors is an integer number (14435802379).

Almost surely, 2^28871604757 is an apocalyptic number.

It is an amenable number.

28871604757 is a deficient number, since it is larger than the sum of its proper divisors (1).

28871604757 is an equidigital number, since it uses as much as digits as its factorization.

28871604757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5268480, while the sum is 55.

The spelling of 28871604757 in words is "twenty-eight billion, eight hundred seventy-one million, six hundred four thousand, seven hundred fifty-seven".