28213834 has 16 divisors (see below), whose sum is σ = 46859616. Its totient is φ = 12632400.

The previous prime is 28213819. The next prime is 28213837. The reversal of 28213834 is 43831282.

It is a junction number, because it is equal to n+sod(n) for n = 28213796 and 28213805.

It is not an unprimeable number, because it can be changed into a prime (28213837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8097 + ... + 11044.

It is an arithmetic number, because the mean of its divisors is an integer number (2928726).

Almost surely, 2^28213834 is an apocalyptic number.

28213834 is a deficient number, since it is larger than the sum of its proper divisors (18645782).

28213834 is a wasteful number, since it uses less digits than its factorization.

28213834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19221.

The product of its digits is 9216, while the sum is 31.

The square root of 28213834 is about 5311.6696056890. The cubic root of 28213834 is about 304.4299447968.

The spelling of 28213834 in words is "twenty-eight million, two hundred thirteen thousand, eight hundred thirty-four".