28906893 has 12 divisors (see below), whose sum is σ = 41861820. Its totient is φ = 19221696.

The previous prime is 28906877. The next prime is 28906901. The reversal of 28906893 is 39860982.

It can be written as a sum of positive squares in 2 ways, for example, as 12236004 + 16670889 = 3498^2 + 4083^2 .

It is not a de Polignac number, because 28906893 - 2⁴ = 28906877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28906093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246 + ... + 7607.

It is an arithmetic number, because the mean of its divisors is an integer number (3488485).

Almost surely, 2^28906893 is an apocalyptic number.

It is an amenable number.

28906893 is a deficient number, since it is larger than the sum of its proper divisors (12954927).

28906893 is a wasteful number, since it uses less digits than its factorization.

28906893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8268 (or 8265 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 28906893 is about 5376.5130893545. The cubic root of 28906893 is about 306.9025321274.

The spelling of 28906893 in words is "twenty-eight million, nine hundred six thousand, eight hundred ninety-three".