28405332784813 has 2 divisors, whose sum is σ = 28405332784814. Its totient is φ = 28405332784812.

The previous prime is 28405332784793. The next prime is 28405332784897. The reversal of 28405332784813 is 31848723350482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28377589551844 + 27743232969 = 5327062^2 + 166563^2 .

It is a cyclic number.

It is not a de Polignac number, because 28405332784813 - 2⁵ = 28405332784781 is a prime.

It is a super-3 number, since 3×28405332784813³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28405332784513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14202666392406 + 14202666392407.

It is an arithmetic number, because the mean of its divisors is an integer number (14202666392407).

Almost surely, 2^{28405332784813} is an apocalyptic number.

It is an amenable number.

28405332784813 is a deficient number, since it is larger than the sum of its proper divisors (1).

28405332784813 is an equidigital number, since it uses as much as digits as its factorization.

28405332784813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30965760, while the sum is 58.

The spelling of 28405332784813 in words is "twenty-eight trillion, four hundred five billion, three hundred thirty-two million, seven hundred eighty-four thousand, eight hundred thirteen".