28457204 has 6 divisors (see below), whose sum is σ = 49800114. Its totient is φ = 14228600.

The previous prime is 28457203. The next prime is 28457213. The reversal of 28457204 is 40275482.

It can be written as a sum of positive squares in only one way, i.e., 22944100 + 5513104 = 4790^2 + 2348^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28457203) 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 as a sum of consecutive naturals, namely, 3557147 + ... + 3557154.

It is an arithmetic number, because the mean of its divisors is an integer number (8300019).

Almost surely, 2^28457204 is an apocalyptic number.

It is an amenable number.

28457204 is a deficient number, since it is larger than the sum of its proper divisors (21342910).

28457204 is a wasteful number, since it uses less digits than its factorization.

28457204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7114305 (or 7114303 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 28457204 is about 5334.5294075485. The cubic root of 28457204 is about 305.3027684148.

The spelling of 28457204 in words is "twenty-eight million, four hundred fifty-seven thousand, two hundred four".