228685782 has 64 divisors (see below), whose sum is σ = 516612096. Its totient is φ = 67011840.

The previous prime is 228685771. The next prime is 228685811. The reversal of 228685782 is 287586822.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136683 + ... + 138345.

It is an arithmetic number, because the mean of its divisors is an integer number (8072064).

Almost surely, 2^228685782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228685782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258306048).

228685782 is an abundant number, since it is smaller than the sum of its proper divisors (287926314).

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

228685782 is a wasteful number, since it uses less digits than its factorization.

228685782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765.

The product of its digits is 860160, while the sum is 48.

The square root of 228685782 is about 15122.3603316414. The cubic root of 228685782 is about 611.5233644139.

The spelling of 228685782 in words is "two hundred twenty-eight million, six hundred eighty-five thousand, seven hundred eighty-two".