28253224 has 16 divisors (see below), whose sum is σ = 53244000. Its totient is φ = 14054832.

The previous prime is 28253207. The next prime is 28253233. The reversal of 28253224 is 42235282.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28253192 and 28253201.

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, 7282 + ... + 10465.

It is an arithmetic number, because the mean of its divisors is an integer number (3327750).

Almost surely, 2^28253224 is an apocalyptic number.

It is an amenable number.

28253224 is a deficient number, since it is larger than the sum of its proper divisors (24990776).

28253224 is a wasteful number, since it uses less digits than its factorization.

28253224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17952 (or 17948 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 28253224 is about 5315.3761861227. The cubic root of 28253224 is about 304.5715528617.

The spelling of 28253224 in words is "twenty-eight million, two hundred fifty-three thousand, two hundred twenty-four".