28210984681 has 8 divisors (see below), whose sum is σ = 30890030400. Its totient is φ = 25551007440.

The previous prime is 28210984649. The next prime is 28210984709. The reversal of 28210984681 is 18648901282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28210984681 - 2⁵ = 28210984649 is a prime.

It is a super-2 number, since 2×28210984681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28210984601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4764021 + ... + 4769938.

It is an arithmetic number, because the mean of its divisors is an integer number (3861253800).

Almost surely, 2^28210984681 is an apocalyptic number.

It is an amenable number.

28210984681 is a deficient number, since it is larger than the sum of its proper divisors (2679045719).

28210984681 is a wasteful number, since it uses less digits than its factorization.

28210984681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9534239.

The product of its (nonzero) digits is 442368, while the sum is 49.

The spelling of 28210984681 in words is "twenty-eight billion, two hundred ten million, nine hundred eighty-four thousand, six hundred eighty-one".