28308055851 has 48 divisors (see below), whose sum is σ = 44854258176. Its totient is φ = 17803976256.

The previous prime is 28308055847. The next prime is 28308055861. The reversal of 28308055851 is 15855080382.

It is not a de Polignac number, because 28308055851 - 2² = 28308055847 is a prime.

It is a super-3 number, since 3×28308055851³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28308055797 and 28308055806.

It is not an unprimeable number, because it can be changed into a prime (28308055861) 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 47 ways as a sum of consecutive naturals, for example, 373306 + ... + 442688.

It is an arithmetic number, because the mean of its divisors is an integer number (934463712).

Almost surely, 2^28308055851 is an apocalyptic number.

28308055851 is a deficient number, since it is larger than the sum of its proper divisors (16546202325).

28308055851 is an equidigital number, since it uses as much as digits as its factorization.

28308055851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69494 (or 69482 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 45.

The spelling of 28308055851 in words is "twenty-eight billion, three hundred eight million, fifty-five thousand, eight hundred fifty-one".