28253012 has 6 divisors (see below), whose sum is σ = 49442778. Its totient is φ = 14126504.

The previous prime is 28253011. The next prime is 28253041. The reversal of 28253012 is 21035282.

It can be written as a sum of positive squares in only one way, i.e., 28026436 + 226576 = 5294^2 + 476^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28253011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3531623 + ... + 3531630.

It is an arithmetic number, because the mean of its divisors is an integer number (8240463).

Almost surely, 2^28253012 is an apocalyptic number.

It is an amenable number.

28253012 is a deficient number, since it is larger than the sum of its proper divisors (21189766).

28253012 is a wasteful number, since it uses less digits than its factorization.

28253012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7063257 (or 7063255 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 28253012 is about 5315.3562439408. The cubic root of 28253012 is about 304.5707910687.

Adding to 28253012 its reverse (21035282), we get a palindrome (49288294).

The spelling of 28253012 in words is "twenty-eight million, two hundred fifty-three thousand, twelve".