28223248 has 10 divisors (see below), whose sum is σ = 54682574. Its totient is φ = 14111616.

The previous prime is 28223201. The next prime is 28223249. The reversal of 28223248 is 84232282.

It can be written as a sum of positive squares in only one way, i.e., 26501904 + 1721344 = 5148^2 + 1312^2 .

It is not an unprimeable number, because it can be changed into a prime (28223249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 881961 + ... + 881992.

Almost surely, 2^28223248 is an apocalyptic number.

It is an amenable number.

28223248 is a deficient number, since it is larger than the sum of its proper divisors (26459326).

28223248 is a wasteful number, since it uses less digits than its factorization.

28223248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763961 (or 1763955 counting only the distinct ones).

The product of its digits is 12288, while the sum is 31.

The square root of 28223248 is about 5312.5556938257. Note that the first 3 decimals coincide. The cubic root of 28223248 is about 304.4638003492.

The spelling of 28223248 in words is "twenty-eight million, two hundred twenty-three thousand, two hundred forty-eight".