28685470 has 48 divisors (see below), whose sum is σ = 57494304. Its totient is φ = 10296000.

The previous prime is 28685467. The next prime is 28685473. The reversal of 28685470 is 7458682.

It is an interprime number because it is at equal distance from previous prime (28685467) and next prime (28685473).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28685473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182632 + ... + 182788.

It is an arithmetic number, because the mean of its divisors is an integer number (1197798).

Almost surely, 2^28685470 is an apocalyptic number.

28685470 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

28685470 is a wasteful number, since it uses less digits than its factorization.

28685470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 28685470 is about 5355.8818134832. The cubic root of 28685470 is about 306.1169117677.

It can be divided in two parts, 2868 and 5470, that added together give a palindrome (8338).

The spelling of 28685470 in words is "twenty-eight million, six hundred eighty-five thousand, four hundred seventy".