28018712 has 16 divisors (see below), whose sum is σ = 52679400. Its totient is φ = 13970880.

The previous prime is 28018681. The next prime is 28018717. The reversal of 28018712 is 21781082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28018717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1589 + ... + 7652.

Almost surely, 2^28018712 is an apocalyptic number.

It is an amenable number.

28018712 is a deficient number, since it is larger than the sum of its proper divisors (24660688).

28018712 is a wasteful number, since it uses less digits than its factorization.

28018712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9626 (or 9622 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 28018712 is about 5293.2704446306. The cubic root of 28018712 is about 303.7265257591.

Adding to 28018712 its reverse (21781082), we get a palindrome (49799794).

The spelling of 28018712 in words is "twenty-eight million, eighteen thousand, seven hundred twelve".