28202836 has 12 divisors (see below), whose sum is σ = 49844340. Its totient is φ = 13961600.

The previous prime is 28202831. The next prime is 28202851. The reversal of 28202836 is 63820282.

It can be written as a sum of positive squares in 2 ways, for example, as 26071236 + 2131600 = 5106^2 + 1460^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28202798 and 28202807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28202831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34501 + ... + 35308.

It is an arithmetic number, because the mean of its divisors is an integer number (4153695).

Almost surely, 2^28202836 is an apocalyptic number.

It is an amenable number.

28202836 is a deficient number, since it is larger than the sum of its proper divisors (21641504).

28202836 is a wasteful number, since it uses less digits than its factorization.

28202836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69914 (or 69912 counting only the distinct ones).

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

The square root of 28202836 is about 5310.6342370756. The cubic root of 28202836 is about 304.3903831681.

The spelling of 28202836 in words is "twenty-eight million, two hundred two thousand, eight hundred thirty-six".