28893838 has 12 divisors (see below), whose sum is σ = 43958808. Its totient is φ = 14243760.

The previous prime is 28893833. The next prime is 28893847. The reversal of 28893838 is 83839882.

It is a junction number, because it is equal to n+sod(n) for n = 28893791 and 28893800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28893833) 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 5 ways as a sum of consecutive naturals, for example, 9303 + ... + 12013.

It is an arithmetic number, because the mean of its divisors is an integer number (3663234).

Almost surely, 2^28893838 is an apocalyptic number.

28893838 is a deficient number, since it is larger than the sum of its proper divisors (15064970).

28893838 is an equidigital number, since it uses as much as digits as its factorization.

28893838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2859 (or 2786 counting only the distinct ones).

The product of its digits is 663552, while the sum is 49.

The square root of 28893838 is about 5375.2988754115. The cubic root of 28893838 is about 306.8563238192.

The spelling of 28893838 in words is "twenty-eight million, eight hundred ninety-three thousand, eight hundred thirty-eight".