28018047877 has 2 divisors, whose sum is σ = 28018047878. Its totient is φ = 28018047876.

The previous prime is 28018047859. The next prime is 28018047947. The reversal of 28018047877 is 77874081082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25446949441 + 2571098436 = 159521^2 + 50706^2 .

It is a cyclic number.

It is not a de Polignac number, because 28018047877 - 2³¹ = 25870564229 is a prime.

It is a super-2 number, since 2×28018047877² (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 (28018047817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14009023938 + 14009023939.

It is an arithmetic number, because the mean of its divisors is an integer number (14009023939).

Almost surely, 2^28018047877 is an apocalyptic number.

It is an amenable number.

28018047877 is a deficient number, since it is larger than the sum of its proper divisors (1).

28018047877 is an equidigital number, since it uses as much as digits as its factorization.

28018047877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1404928, while the sum is 52.

The spelling of 28018047877 in words is "twenty-eight billion, eighteen million, forty-seven thousand, eight hundred seventy-seven".