228021004 has 24 divisors (see below), whose sum is σ = 404520480. Its totient is φ = 112452096.

The previous prime is 228020977. The next prime is 228021037. The reversal of 228021004 is 400120822.

228021004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138474 + ... + 140110.

It is an arithmetic number, because the mean of its divisors is an integer number (16855020).

Almost surely, 2^228021004 is an apocalyptic number.

It is an amenable number.

228021004 is a deficient number, since it is larger than the sum of its proper divisors (176499476).

228021004 is a wasteful number, since it uses less digits than its factorization.

228021004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097 (or 2095 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 228021004 is about 15100.3643664648. The cubic root of 228021004 is about 610.9302334795.

Adding to 228021004 its reverse (400120822), we get a palindrome (628141826).

The spelling of 228021004 in words is "two hundred twenty-eight million, twenty-one thousand, four".