28028306310431 has 16 divisors (see below), whose sum is σ = 33425788520448. Its totient is φ = 22979229187200.

The previous prime is 28028306310419. The next prime is 28028306310491. The reversal of 28028306310431 is 13401360382082.

It is a cyclic number.

It is not a de Polignac number, because 28028306310431 - 2¹⁰ = 28028306309407 is a prime.

It is a super-2 number, since 2×28028306310431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28028306310491) 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, 5616791 + ... + 9359751.

It is an arithmetic number, because the mean of its divisors is an integer number (2089111782528).

Almost surely, 2^{28028306310431} is an apocalyptic number.

28028306310431 is a deficient number, since it is larger than the sum of its proper divisors (5397482210017).

28028306310431 is a wasteful number, since it uses less digits than its factorization.

28028306310431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3789502.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 28028306310431 in words is "twenty-eight trillion, twenty-eight billion, three hundred six million, three hundred ten thousand, four hundred thirty-one".