28508427349381 has 8 divisors (see below), whose sum is σ = 32581095058304. Its totient is φ = 24435768448080.

The previous prime is 28508427349379. The next prime is 28508427349393. The reversal of 28508427349381 is 18394372480582.

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 28508427349381 - 2¹ = 28508427349379 is a prime.

It is a super-2 number, since 2×28508427349381² (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 (28508427349351) 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, 7706656 + ... + 10789318.

It is an arithmetic number, because the mean of its divisors is an integer number (4072636882288).

Almost surely, 2^{28508427349381} is an apocalyptic number.

28508427349381 is the 3082663-rd octagonal number.

It is an amenable number.

28508427349381 is a deficient number, since it is larger than the sum of its proper divisors (4072667708923).

28508427349381 is a wasteful number, since it uses less digits than its factorization.

28508427349381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4403811.

The product of its (nonzero) digits is 92897280, while the sum is 64.

The spelling of 28508427349381 in words is "twenty-eight trillion, five hundred eight billion, four hundred twenty-seven million, three hundred forty-nine thousand, three hundred eighty-one".