28892861 has 8 divisors (see below), whose sum is σ = 29693664. Its totient is φ = 28098000.

The previous prime is 28892803. The next prime is 28892869. The reversal of 28892861 is 16829882.

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 28892861 - 2¹⁸ = 28630717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28892869) 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, 9455 + ... + 12131.

It is an arithmetic number, because the mean of its divisors is an integer number (3711708).

Almost surely, 2^28892861 is an apocalyptic number.

It is an amenable number.

28892861 is a deficient number, since it is larger than the sum of its proper divisors (800803).

28892861 is a wasteful number, since it uses less digits than its factorization.

28892861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971.

The product of its digits is 110592, while the sum is 44.

The square root of 28892861 is about 5375.2079959756. The cubic root of 28892861 is about 306.8528651578.

The spelling of 28892861 in words is "twenty-eight million, eight hundred ninety-two thousand, eight hundred sixty-one".