102806228 has 48 divisors (see below), whose sum is σ = 218152704. Its totient is φ = 41437440.

The previous prime is 102806213. The next prime is 102806233. The reversal of 102806228 is 822608201.

It is a self number, because there is not a number n which added to its sum of digits gives 102806228.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37976 + ... + 40592.

It is an arithmetic number, because the mean of its divisors is an integer number (4544848).

Almost surely, 2^102806228 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 102806228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109076352).

102806228 is an abundant number, since it is smaller than the sum of its proper divisors (115346476).

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

102806228 is a wasteful number, since it uses less digits than its factorization.

102806228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712 (or 2710 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 102806228 is about 10139.3406097241. The cubic root of 102806228 is about 468.4606769741.

The spelling of 102806228 in words is "one hundred two million, eight hundred six thousand, two hundred twenty-eight".