28727613 has 12 divisors (see below), whose sum is σ = 41645760. Its totient is φ = 19082376.

The previous prime is 28727591. The next prime is 28727623. The reversal of 28727613 is 31672782.

It is not a de Polignac number, because 28727613 - 2⁶ = 28727549 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28727623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3093 + ... + 8186.

It is an arithmetic number, because the mean of its divisors is an integer number (3470480).

Almost surely, 2^28727613 is an apocalyptic number.

It is an amenable number.

28727613 is a deficient number, since it is larger than the sum of its proper divisors (12918147).

28727613 is a wasteful number, since it uses less digits than its factorization.

28727613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11568 (or 11565 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 28727613 is about 5359.8146423174. The cubic root of 28727613 is about 306.2667480498.

The spelling of 28727613 in words is "twenty-eight million, seven hundred twenty-seven thousand, six hundred thirteen".