28101712 has 10 divisors (see below), whose sum is σ = 54447098. Its totient is φ = 14050848.

The previous prime is 28101701. The next prime is 28101719. The reversal of 28101712 is 21710182.

It can be written as a sum of positive squares in only one way, i.e., 27499536 + 602176 = 5244^2 + 776^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28101719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 878163 + ... + 878194.

Almost surely, 2^28101712 is an apocalyptic number.

It is an amenable number.

28101712 is a deficient number, since it is larger than the sum of its proper divisors (26345386).

28101712 is a wasteful number, since it uses less digits than its factorization.

28101712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756365 (or 1756359 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 28101712 is about 5301.1047905130. The cubic root of 28101712 is about 304.0261404114.

Adding to 28101712 its reverse (21710182), we get a palindrome (49811894).

The spelling of 28101712 in words is "twenty-eight million, one hundred one thousand, seven hundred twelve".