28016804 has 6 divisors (see below), whose sum is σ = 49029414. Its totient is φ = 14008400.

The previous prime is 28016803. The next prime is 28016819. The reversal of 28016804 is 40861082.

It can be written as a sum of positive squares in only one way, i.e., 25300900 + 2715904 = 5030^2 + 1648^2 .

It is not an unprimeable number, because it can be changed into a prime (28016803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3502097 + ... + 3502104.

It is an arithmetic number, because the mean of its divisors is an integer number (8171569).

Almost surely, 2^28016804 is an apocalyptic number.

It is an amenable number.

28016804 is a deficient number, since it is larger than the sum of its proper divisors (21012610).

28016804 is a wasteful number, since it uses less digits than its factorization.

28016804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7004205 (or 7004203 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28016804 is about 5293.0902127207. The cubic root of 28016804 is about 303.7196312789.

Adding to 28016804 its reverse (40861082), we get a palindrome (68877886).

The spelling of 28016804 in words is "twenty-eight million, sixteen thousand, eight hundred four".