28306421358529 has 16 divisors (see below), whose sum is σ = 29049570950400. Its totient is φ = 27567233761536.

The previous prime is 28306421358473. The next prime is 28306421358539. The reversal of 28306421358529 is 92585312460382.

It is a cyclic number.

It is not a de Polignac number, because 28306421358529 - 2²⁷ = 28306287140801 is a prime.

It is a super-2 number, since 2×28306421358529² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28306421358539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22118217 + ... + 23362969.

It is an arithmetic number, because the mean of its divisors is an integer number (1815598184400).

Almost surely, 2^{28306421358529} is an apocalyptic number.

It is an amenable number.

28306421358529 is a deficient number, since it is larger than the sum of its proper divisors (743149591871).

28306421358529 is a wasteful number, since it uses less digits than its factorization.

28306421358529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246344.

The product of its (nonzero) digits is 24883200, while the sum is 58.

The spelling of 28306421358529 in words is "twenty-eight trillion, three hundred six billion, four hundred twenty-one million, three hundred fifty-eight thousand, five hundred twenty-nine".