28716013 has 8 divisors (see below), whose sum is σ = 30274560. Its totient is φ = 27197040.

The previous prime is 28716001. The next prime is 28716041. The reversal of 28716013 is 31061782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28716013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28716073) 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, 8398 + ... + 11311.

It is an arithmetic number, because the mean of its divisors is an integer number (3784320).

Almost surely, 2^28716013 is an apocalyptic number.

It is an amenable number.

28716013 is a deficient number, since it is larger than the sum of its proper divisors (1558547).

28716013 is a wasteful number, since it uses less digits than its factorization.

28716013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19787.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 28716013 is about 5358.7324060826. The cubic root of 28716013 is about 306.2255197425.

Adding to 28716013 its reverse (31061782), we get a palindrome (59777795).

The spelling of 28716013 in words is "twenty-eight million, seven hundred sixteen thousand, thirteen".