28016703281 has 8 divisors (see below), whose sum is σ = 32024798784. Its totient is φ = 24010035120.

The previous prime is 28016703269. The next prime is 28016703287. The reversal of 28016703281 is 18230761082.

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 28016703281 - 2⁶ = 28016703217 is a prime.

It is a super-2 number, since 2×28016703281² (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 (28016703287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314435 + ... + 393576.

It is an arithmetic number, because the mean of its divisors is an integer number (4003099848).

Almost surely, 2^28016703281 is an apocalyptic number.

It is an amenable number.

28016703281 is a deficient number, since it is larger than the sum of its proper divisors (4008095503).

28016703281 is an equidigital number, since it uses as much as digits as its factorization.

28016703281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713671.

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 28016703281 in words is "twenty-eight billion, sixteen million, seven hundred three thousand, two hundred eighty-one".