28585216 has 36 divisors (see below), whose sum is σ = 62252064. Its totient is φ = 12992000.

The previous prime is 28585189. The next prime is 28585217. The reversal of 28585216 is 61258582.

It is a super-2 number, since 2×28585216² = 1634229147533312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28585217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2260 + ... + 7891.

It is an arithmetic number, because the mean of its divisors is an integer number (1729224).

Almost surely, 2^28585216 is an apocalyptic number.

It is an amenable number.

28585216 is an abundant number, since it is smaller than the sum of its proper divisors (33666848).

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

28585216 is a wasteful number, since it uses less digits than its factorization.

28585216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10178 (or 10164 counting only the distinct ones).

The product of its digits is 38400, while the sum is 37.

The square root of 28585216 is about 5346.5143785461. The cubic root of 28585216 is about 305.7598754116.

The spelling of 28585216 in words is "twenty-eight million, five hundred eighty-five thousand, two hundred sixteen".