28263628 has 12 divisors (see below), whose sum is σ = 50394960. Its totient is φ = 13865072.

The previous prime is 28263623. The next prime is 28263649. The reversal of 28263628 is 82636282.

It is not an unprimeable number, because it can be changed into a prime (28263623) 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 in 3 ways as a sum of consecutive naturals, for example, 66448 + ... + 66871.

It is an arithmetic number, because the mean of its divisors is an integer number (4199580).

Almost surely, 2^28263628 is an apocalyptic number.

It is an amenable number.

28263628 is a deficient number, since it is larger than the sum of its proper divisors (22131332).

28263628 is a wasteful number, since it uses less digits than its factorization.

28263628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133376 (or 133374 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 28263628 is about 5316.3547661908. The cubic root of 28263628 is about 304.6089335345.

The spelling of 28263628 in words is "twenty-eight million, two hundred sixty-three thousand, six hundred twenty-eight".