228506144 has 12 divisors (see below), whose sum is σ = 449871534. Its totient is φ = 114253056.

The previous prime is 228506143. The next prime is 228506189. The reversal of 228506144 is 441605822.

228506144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 170563600 + 57942544 = 13060^2 + 7612^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 7140817 = 228506144 / (2 + 2 + 8 + 5 + 0 + 6 + 1 + 4 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 228506144.

It is not an unprimeable number, because it can be changed into a prime (228506143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3570377 + ... + 3570440.

Almost surely, 2^228506144 is an apocalyptic number.

It is an amenable number.

228506144 is a deficient number, since it is larger than the sum of its proper divisors (221365390).

228506144 is an equidigital number, since it uses as much as digits as its factorization.

228506144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7140827 (or 7140819 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 228506144 is about 15116.4196819220. The cubic root of 228506144 is about 611.3632005277.

The spelling of 228506144 in words is "two hundred twenty-eight million, five hundred six thousand, one hundred forty-four".