20286208 has 36 divisors (see below), whose sum is σ = 40920880. Its totient is φ = 10036224.

The previous prime is 20286199. The next prime is 20286223. The reversal of 20286208 is 80268202.

It is a happy number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27541 + ... + 28267.

Almost surely, 2^20286208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20286208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20460440).

20286208 is an abundant number, since it is smaller than the sum of its proper divisors (20634672).

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

20286208 is an equidigital number, since it uses as much as digits as its factorization.

20286208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 20286208 is about 4504.0213143368. The cubic root of 20286208 is about 272.7304472627.

The spelling of 20286208 in words is "twenty million, two hundred eighty-six thousand, two hundred eight".