28302314781 has 64 divisors (see below), whose sum is σ = 43139416320. Its totient is φ = 16378951680.

The previous prime is 28302314773. The next prime is 28302314837. The reversal of 28302314781 is 18741320382.

It is not a de Polignac number, because 28302314781 - 2³ = 28302314773 is a prime.

It is a super-2 number, since 2×28302314781² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28302314741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25337235 + ... + 25338351.

It is an arithmetic number, because the mean of its divisors is an integer number (674053380).

Almost surely, 2^28302314781 is an apocalyptic number.

It is an amenable number.

28302314781 is a deficient number, since it is larger than the sum of its proper divisors (14837101539).

28302314781 is a wasteful number, since it uses less digits than its factorization.

28302314781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726.

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 28302314781 in words is "twenty-eight billion, three hundred two million, three hundred fourteen thousand, seven hundred eighty-one".