28258012 has 12 divisors (see below), whose sum is σ = 52360560. Its totient is φ = 13297856.

The previous prime is 28258001. The next prime is 28258033. The reversal of 28258012 is 21085282.

It is a congruent number.

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, 207712 + ... + 207847.

It is an arithmetic number, because the mean of its divisors is an integer number (4363380).

Almost surely, 2^28258012 is an apocalyptic number.

It is an amenable number.

28258012 is a deficient number, since it is larger than the sum of its proper divisors (24102548).

28258012 is a wasteful number, since it uses less digits than its factorization.

28258012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415580 (or 415578 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 28258012 is about 5315.8265584949. The cubic root of 28258012 is about 304.5887568715.

The spelling of 28258012 in words is "twenty-eight million, two hundred fifty-eight thousand, twelve".