28004324 has 12 divisors (see below), whose sum is σ = 49101948. Its totient is φ = 13975200.

The previous prime is 28004323. The next prime is 28004329. The reversal of 28004324 is 42340082.

It can be written as a sum of positive squares in 2 ways, for example, as 16321600 + 11682724 = 4040^2 + 3418^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28004324.

It is not an unprimeable number, because it can be changed into a prime (28004323) 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, 4307 + ... + 8634.

It is an arithmetic number, because the mean of its divisors is an integer number (4091829).

Almost surely, 2^28004324 is an apocalyptic number.

It is an amenable number.

28004324 is a deficient number, since it is larger than the sum of its proper divisors (21097624).

28004324 is a wasteful number, since it uses less digits than its factorization.

28004324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13486 (or 13484 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 28004324 is about 5291.9111859516. The cubic root of 28004324 is about 303.6745275862.

The spelling of 28004324 in words is "twenty-eight million, four thousand, three hundred twenty-four".