28981032667 has 8 divisors (see below), whose sum is σ = 29241875520. Its totient is φ = 28720790280.

The previous prime is 28981032653. The next prime is 28981032679. The reversal of 28981032667 is 76623018982.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28981032667 is a prime.

It is a super-3 number, since 3×28981032667³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28981032607) 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, 52873 + ... + 246490.

It is an arithmetic number, because the mean of its divisors is an integer number (3655234440).

Almost surely, 2^28981032667 is an apocalyptic number.

28981032667 is a deficient number, since it is larger than the sum of its proper divisors (260842853).

28981032667 is a wasteful number, since it uses less digits than its factorization.

28981032667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300233.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 28981032667 in words is "twenty-eight billion, nine hundred eighty-one million, thirty-two thousand, six hundred sixty-seven".