28789713 has 12 divisors (see below), whose sum is σ = 41766660. Its totient is φ = 19109376.

The previous prime is 28789711. The next prime is 28789723. The reversal of 28789713 is 31798782.

It can be written as a sum of positive squares in 2 ways, for example, as 8105409 + 20684304 = 2847^2 + 4548^2 .

It is not a de Polignac number, because 28789713 - 2¹ = 28789711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28789711) 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, 4768 + ... + 8961.

It is an arithmetic number, because the mean of its divisors is an integer number (3480555).

Almost surely, 2^28789713 is an apocalyptic number.

It is an amenable number.

28789713 is a deficient number, since it is larger than the sum of its proper divisors (12976947).

28789713 is a wasteful number, since it uses less digits than its factorization.

28789713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13968 (or 13965 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 28789713 is about 5365.6046257621. The cubic root of 28789713 is about 306.4872731246.

It can be divided in two parts, 287 and 89713, that added together give a square (90000 = 300²).

The spelling of 28789713 in words is "twenty-eight million, seven hundred eighty-nine thousand, seven hundred thirteen".