228664784 has 20 divisors (see below), whose sum is σ = 443291940. Its totient is φ = 114266880.

The previous prime is 228664771. The next prime is 228664811. The reversal of 228664784 is 487466822.

It can be written as a sum of positive squares in 2 ways, for example, as 16321600 + 212343184 = 4040^2 + 14572^2 .

Its product of digits (1032192) is a multiple of the sum of its prime divisors (8192).

It is a congruent number.

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, 37502 + ... + 43170.

It is an arithmetic number, because the mean of its divisors is an integer number (22164597).

Almost surely, 2^228664784 is an apocalyptic number.

It is an amenable number.

228664784 is a deficient number, since it is larger than the sum of its proper divisors (214627156).

228664784 is a wasteful number, since it uses less digits than its factorization.

228664784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8198 (or 8192 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 47.

The square root of 228664784 is about 15121.6660457768. Note that the first 3 decimals coincide. The cubic root of 228664784 is about 611.5046470855.

The spelling of 228664784 in words is "two hundred twenty-eight million, six hundred sixty-four thousand, seven hundred eighty-four".