228785004 has 144 divisors (see below), whose sum is σ = 706567680. Its totient is φ = 60963840.

The previous prime is 228785003. The next prime is 228785009. The reversal of 228785004 is 400587822.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 228785004.

It is not an unprimeable number, because it can be changed into a prime (228785003) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 339612 + ... + 340284.

It is an arithmetic number, because the mean of its divisors is an integer number (4906720).

Almost surely, 2^228785004 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 228785004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353283840).

228785004 is an abundant number, since it is smaller than the sum of its proper divisors (477782676).

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

228785004 is a wasteful number, since it uses less digits than its factorization.

228785004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 228785004 is about 15125.6406145327. The cubic root of 228785004 is about 611.6117940449.

The spelling of 228785004 in words is "two hundred twenty-eight million, seven hundred eighty-five thousand, four".