28105716 has 24 divisors (see below), whose sum is σ = 67696384. Its totient is φ = 9066240.

The previous prime is 28105711. The next prime is 28105717. The reversal of 28105716 is 61750182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28105711) 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, 37405 + ... + 38148.

Almost surely, 2^28105716 is an apocalyptic number.

It is an amenable number.

28105716 is an abundant number, since it is smaller than the sum of its proper divisors (39590668).

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

28105716 is a wasteful number, since it uses less digits than its factorization.

28105716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75591 (or 75589 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 28105716 is about 5301.4824341876. The cubic root of 28105716 is about 304.0405791860.

Adding to 28105716 its reverse (61750182), we get a palindrome (89855898).

The spelling of 28105716 in words is "twenty-eight million, one hundred five thousand, seven hundred sixteen".