28228652 has 12 divisors (see below), whose sum is σ = 49441560. Its totient is φ = 14102496.

The previous prime is 28228639. The next prime is 28228663. The reversal of 28228652 is 25682282.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4499 + ... + 8757.

It is an arithmetic number, because the mean of its divisors is an integer number (4120130).

Almost surely, 2^28228652 is an apocalyptic number.

It is an amenable number.

28228652 is a deficient number, since it is larger than the sum of its proper divisors (21212908).

28228652 is a wasteful number, since it uses less digits than its factorization.

28228652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5920 (or 5918 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

The square root of 28228652 is about 5313.0642759146. The cubic root of 28228652 is about 304.4832313442.

The spelling of 28228652 in words is "twenty-eight million, two hundred twenty-eight thousand, six hundred fifty-two".