28001712 has 40 divisors (see below), whose sum is σ = 73425856. Its totient is φ = 9193536.

The previous prime is 28001693. The next prime is 28001713. The reversal of 28001712 is 21710082.

It is not an unprimeable number, because it can be changed into a prime (28001713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1138 + ... + 7569.

Almost surely, 2^28001712 is an apocalyptic number.

It is an amenable number.

28001712 is an abundant number, since it is smaller than the sum of its proper divisors (45424144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28001712 is a wasteful number, since it uses less digits than its factorization.

28001712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8785 (or 8779 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 28001712 is about 5291.6643884510. The cubic root of 28001712 is about 303.6650859190.

Adding to 28001712 its reverse (21710082), we get a palindrome (49711794).

The spelling of 28001712 in words is "twenty-eight million, one thousand, seven hundred twelve".