28565208 has 144 divisors (see below), whose sum is σ = 93908880. Its totient is φ = 7682688.

The previous prime is 28565179. The next prime is 28565209. The reversal of 28565208 is 80256582.

It is a super-2 number, since 2×28565208² = 1631942216166528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28565209) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 181866 + ... + 182022.

It is an arithmetic number, because the mean of its divisors is an integer number (652145).

Almost surely, 2^28565208 is an apocalyptic number.

28565208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28565208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46954440).

28565208 is an abundant number, since it is smaller than the sum of its proper divisors (65343672).

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

28565208 is a wasteful number, since it uses less digits than its factorization.

28565208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 28565208 is about 5344.6429253974. The cubic root of 28565208 is about 305.6885206774.

The spelling of 28565208 in words is "twenty-eight million, five hundred sixty-five thousand, two hundred eight".